CaddyJimz06

I have a 2004 Z06 with about 20,000 miles (Yea, I don't drive it enough ) and the check engine light came on. Afterwards, I took it to O'Donnell Chevrolet-Buick, where I get my usual oil change and wheel work done. I get a call back saying that I need the check valves replaced, throttle body cleaned, and injectors cleaned and the total estimate came out to be $1,434.62 .

I inquired why the cost was so high and the service writer told me that the job takes about 5 hours and that the intake needs to be removed to access the check valves. At this point I'm thinking is this some insane Corvette tax at work or is the cost really legitimate? I would never have thought those would be the figures for check valves and cleanings.

In addition, the steering column lock message has appeared since last month and the gentleman at the dealrship told me it will be $1,100.00 to get that solved .

Finally, I asked him if I can just pick the car up since I wanted to take some time to consider but he said I need to pay $190.00 for the diagnostic work!

I am a frugal dental student living on student loans and I would like to fix the problem correctly and not get hustled. Any feedback or advice would be greatly appreciated.

P.S. I also asked the service writer to give me the codes. He was hesitant and asked questions such as what I wanted the codes for and what I was planning to do with them. Eventually I was able to get them out of him and they are: p0492, p0121, and p0300.

gmccreary

I think you're being taken for a ride. Run, Forest, run. You can check your own codes through the DIC. Checkout this website: http://www.stengel.net/diccodes.htm or this one: http://www.c5forum.com/ayc/2000dtc.php. Two of the codes they gave you don't exist.

jmc12

The IPC display, the 20-character, vacuum florescent screen above the steering column that says "Corvette by Chevrolet" every time you turn on the key is a powerful device.

DIY Service Techs are going to be most interested in the LPG’s ability to show diagnostic trouble codes (DTC) for all the modules that transmit them.

The "diagnostic display" mode is entered with the following Procedure: Page 8-500

1) Turn on the ignition but don't start the engine.
2) Press the "reset" button to turn off any warning messages
3) Press and hold "options" and
4) While holding "options", press "fuel" four times within a 10-Second period.

Initially, the on-board diagnostics go into the "automatic" mode, which shows each module's DTCs in a
pre-set sequence: (Page No. are for the GM Service Manual)
10 PCNI Powertrain Control Module page 6-357 - 6-361
28 TCS Traction Control system ABS on page 5-86
?? RTD Real Time damping page 3-136
40 BCM Body Control Module page 8-405 LTD Page 8-727
60 [PC instrument Pane! Cluster page 8-508
80 radio page 8-213
99 FIVAC Heater Vent-Air Conditioning page 1-118
A0 LDCM Left Door Control module page 8-904 to 8-951
Al RDCM Right Door Control Module page 8-904 to 8-951
AC SCM Seat Control module page 8-1064-8-1082
B0 RFA Remote Function Actuation page 8-676

For each module, all DTCs will be displayed. If none are present in a module, you will see "no more codes" on the ICP display.
There are two kinds of DTCs, "Current" and "History," designated with a letter suffix, "C" or "H". A current code indicates that the malfunction is present in the system whose module is displaying data. A history code indicates a problem existed in that module sometime in the last 40 or 50 ignition cycles. When not accompanied by a current code of the same number, it is possible it's evidence of a previous problem. Now solved, that was not removed by clearing codes. More likely is that a history code indicates an intermittent malfunction.

"Intermittent" are the most challenging DTCs. An intermittent may have happened only once, may have happened more than once but is inconsistent in its appearance or may be happening on a regular basis but not at the time the IPC is displaying codes. History codes can also be caused by a current malfunction in a system that is not Operating at the time DTCs are displayed. An example is the rear window defogger, which doesn't operate until the BCM detects engine rpm. For history codes set by a system that does not operate with the key on and engine off, a special diagnostic tool called a "scan tester is necessary to properly diagnose the malfunction.

Once the IPC has displayed all 11 modules, the system goes into the manual mode, which allows selection of each module, using combinations of DIC buttons. The manual mode can also be entered at any time during the automatic sequence by pressing any button except "E/M". Once the IPC displays "manual diagnostics", you may select a particular module by pressing the options button to go forward or the "trip" button to go back. Once a system is selected and a DTC is displayed, if more than one are present; press "gages" To move forward or "fuel" to go back. To exit the diagnostic mode at any time, press E/M". If you want to erase or "clear" codes, press "reset". Clearing a code does not repair a problem. You are simply erasing the evidence of it in the module's memory.












IPC Display Codes
Dedicated to ALL Corvette Enthusiasts

IPC Display Functions & Codes

10 PCM Powertrain Control Module page 6-357 - 6-361 Domestic

A=DTC set immediately and MIL is turned on

B=MIL turned on after 2 consecutive drive trips

C=After one failure and stored in History MIL not turned on

P0101 Mass Air Flow (MAF) System performance -B

P0102 Mass Air Flow (MAF) Sensor Circuit Low Frequency -A

P0103 Mass Air Flow (MAF) Sensor Circuit High Frequency -A

P0107 manifold Absolute Pressure (MAP) Sensor Circuit Low Voltage -A

P0108 manifold Absolute Pressure (MAP) Sensor Circuit High Voltage -A

P0112 Intake Air temperature (IAT) Sensor Circuit Low Voltage-B

P0113 Intake Air temperature (IAT) Sensor Circuit High Voltage -B

P0117 Engine Coolant Temperature (ECT) Sensor Low Voltage -A

P0118 Engine Coolant Temperature (ECT) Sensor High Voltage -A

P0118 Engine Coolant Temperature(ECT)Excessive Time to Closed Loop Fuel Control -B

P0131 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 1 Sensor 1-A

P0132 Heated Oxygen Sensor (HO25) Circuit High Voltage Bank 1 Sensor 1-A

P0133 Heated Oxygen Sensor (HO25) Slow Response Bank 1 Sensor 1-B

P0134 Heated Oxygen Sensor (HO25) Circuit Insufficient Activity Bank 1 Sensor 1-A

P0135 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 1 Sensor 1-B

P0137 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 1 Sensor 2-B

P0138 Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 1 Sensor 2-B

P0140 Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 1 Sensor 2-B

P0141 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 1 Sensor 2-B

P0151 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 2 Sensor 1-A

P0152 Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 2 Sensor 1-A

P0153 Heated Oxygen Sensor (HO2S) Slow Response Bank 2 Sensor 1-A

P0154 Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 2 Sensor 1-A

P0155 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 1-B

P0157 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 2 Sensor 2-B

P0158 Heated Oxygen Sensor (HO2S) Circuit High Voltage Bank 2 Sensor 2-B

P0160 Heated Oxygen Sensor (HO2S) Circuit Insufficient Activity Bank 2 Sensor 2-B

P0161 Heated Oxygen Sensor (HO2S) Heater Circuit Bank 2 Sensor 2-B

P0171 Fuel Trim System Lean bank 1-B

P0172 Fuel Trim System Rich bank 1-B

P0174 Fuel Trim System Lean bank 2-B

P0175 Fuel Trim System Rich bank 2-B

P0230 Fuel Pump Control Circuit -A

P0300 Engine Misfire detected-B

P0325 Knock Sensor (KS) System -B

P0327 Knock Sensor (KS) Circuit Front -B

P0332 Knock Sensor (KS) Circuit Rear -B

P0335 CKP Sensor Circuit -A

P0336 CKP Sensor Circuit Performance -A

P0341 CMP Circuit Performance -B

P0342 CMP Sensor Circuit Low Voltage -B

P0343 CMP Sensor Circuit High Voltage -B

P0351 Ignition Control #1 Circuit -A

P0352 Ignition Control #2 Circuit -A

P0353 Ignition Control #3 Circuit -A

P0354 Ignition Control #4 Circuit -A

P0355 Ignition Control #5 Circuit -A

P0356 Ignition Control #6 Circuit -A

P0357 Ignition Control #7 Circuit -A

P0358 Ignition Control #8 Circuit -A

P0410 AIR System-B

P0412 AIR Solenoid relay Control Circuit-B

P0418 AIR Pump Relay Control Circuit -B

P0420 TWC System Low Efficiency Bank 1-A

P0430 TWC System Low Efficiency Bank 2-A

P0441 EVAP System No Flow During Purge -B

P0461 Fuel Level Sensor 1 Circuit Performance -C

P0462 Fuel Level Sensor 1 Circuit Low Voltage -C

P0463 Fuel Level Sensor 1 Circuit High Voltage -C

P0480 FC Relay 1 Control Circuit -B

P0481 FC Relay 2 and 3 Control Circuit -B

P0500 VSS Circuit (M/T) -B

P0506 Idle Speed Low -B

P0507 Idle Speed High -B

P0522 Engine Oil Pressure Sensor Circuit Low Voltage (w/message) -C

P0523 Engine Oil Pressure Sensor Circuit High Voltage (w/message) -C

P0530 A/C Refrigerant Pressure Sensor Circuit - C

P0562 System Voltage Low -C

P0563 System Voltage High -C

P0567 Cruise Resume Circuit -C

P0568 Cruise Set Circuit -C

P0571 Cruise Brake Switch Circuit (M/T) -C

P0601 PCM Memory -A

P0602 PCM Not Programmed -A

P0604 PCM RAM Performance -A

P0606 PCM Internal Communication Interrupted -A

P0608 VSS Output Circuit -C

P0650 MIL Control Circuit-B (No MIL)

P0654 Engine Speed Output Circuit -C

P0704 Clutch Switch Circuit(M/T) -B

P0705 Transmission range Switch Circuit (A/T) -C

P0706 Transmission Range Switch Performance (A/T) -C

P0801 Reverse Inhibit Solenoid Control Circuit (M/T) -C

P0803 1-4 Upshift Solenoid Control Circuit (M/T) -B

P0804 1-4 Upshift lamp Control Circuit (M/T) -C

P1111 Intake Air temperature (IAT) Sensor Circuit Intermittent High Voltage -C

P1112 Intake Air temperature (IAT) Sensor Circuit Intermittent Low Voltage -C

P1114 ECT Sensor Circuit Intermittent Low Voltage -C

P1115 ECT Sensor Circuit Intermittent High Voltage -C

P1120 TP sensor 1 Circuit -A

P1125 APP System -A

P1133 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank 1 Sensor 1-8

P1134 Heated Oxygen Sensor (HO2S) Transition Time ratio Bank 1 Sensor 1-B

P1153 Heated Oxygen Sensor (HO2S) Insufficient Switching Bank2 Sensor 1-B

P1154 Heated Oxygen Sensor (HO2S) Transition Time ratio Bank 2 Sensor 1-B

P1220 TP sensor 2 Circuit -A

P1221 TP Sensors 1,2 Performance -A

P1258 Engine Coolant Over Temperature-Fuel disabled -A

P1275 APP Sensor 1 Circuit-C

P1276 APP Sensor 1 Circuit Performance -C

P1280 APP Sensor 2 Circuit -C

P1281 APP Sensor 2 Circuit Performance -C

P1285 APP Sensor 3 Circuit -C

P1286 APP Sensor 3 Circuit Performance -C

P1380 EB(T)CM DTC Detected- rough road data Unusable -C

P1381 Misfire Detected - No EB(T)CM/PCM Serial data -V

P1415 AIR System bank 1-B

P1416 AIR System bank 2-B

P1431 Fuel Level Sensor 2 Circuit Performance -C

P1432 Fuel Level Sensor 2 Low Voltage -C

P1433 Fuel Level Sensor 2 High Voltage -C

P1441 Evaporative Emissions (EVAP) System Flow During Non-Purge-B

P1S14TAC System MAF Performance -A

P1515 Command vs Actual Throttle Position performance (PCM Module) -A

P1516 Command vs Actual Throttle Position performance (TAC Module) -A

P1S17TAC Module Processor-A

P1518 PCM to TAC Module Serial Data Circuit -

P1539 A/C Clutch Status Circuit High Voltage -C

P1545 A/C Clutch Relay Control Circuit -C

P1546 A/C Clutch Status Circuit Low Voltage -C

P1571 ASR Desired Torque -C

P1574 Stop lamp Control Circuit -C

P1575 Extended Travel Brake Switch Circuit High Voltage -C

P1626 Theft Deterrent System Fuel enable Circuit -C

P1630 Theft Deterrent System PCM in Learn Mode -C

P1631 Theft Deterrent System password Incorrect-C

P16355 volt Reference #1 Circuit-B

P16395 volt Reference #2 Circuit-B

P1644 Delivered Torque Output Circuit -C

P1652 Powetrain Induced Chassis Pitch Output Circuit –

28 TCS Traction Control system ABS on page 5-86

C1214 Sol Valve relay Contact or coil CKT Open

C1217 BPMV Pump Motor Relay Contact CKT Open

C1221 LF Wheel Speed Sensor Input Signal is 0

C1222 RF Wheel Speed Sensor Input Signal is 0

C1223 LR Wheel Speed Sensor Input Signal is 0

C1224 RR Wheel Speed Sensor Input Signal is 0

C1225 LF Excessive Wheel Speed Variation

C1226 RF Excessive Wheel Speed Variation

C1227 LR Excessive Wheel Speed Variation

C1228 RR Excessive Wheel Speed Variation

C1232 LF Wheel Speed Circuit Open or Shorted

C1233 RF Wheel Speed Circuit Open or Shorted

C1234 LR Wheel Speed Circuit Open or Shorted

C1235 RR Wheel Speed Circuit Open or Shorted

C1236 Low System Supply Voltage

C1237 High System Supply Voltage

C1241 Magna Steer Circuit Malfunction Refer to variable effort steering on Steering

C1242 BPMV Pump Motor Ground Circuit Open

C1243 BPMV Pump Motor Stalled

C1255 EBTCM Internal malfunction

CEBCM Internal Malfunction

C1261 LF Inlet Valve Solenoid Malfunction

C1262 LF Outlet Valve Solenoid Malfunction

C1263 RF Inlet Valve Solenoid Malfunction

C1264 RF Outlet Valve Solenoid Malfunction

C1265 LR Inlet Valve Solenoid Malfunction

C1266 LR Outlet Valve Solenoid Malfunction

C1267 BR Inlet Valve Solenoid Malfunction

C1268 BR Outlet Valve Solenoid Malfunction

C1273 RF TCS Master Cyl Isolation Valve malfunction

C1274 RFTCS Prime Valve malfunction

C1276 Delivered Torque Signal CKT malfunction

C1277 Requested Torque Signal CKT Malfunction

C1278 TCS Temporarily Inhibited by PCM

C1281 Steering Sensor Uncorrelated Malfunction

C1286 Steering Sensor Bias Malfunction

C1287 Steering Sensor rate malfunction

C1291 Open brake lamp Sw Contacts During Deccel

C1293 DTC C1291/C1292 Set Curnt/Prev lgn Cycle

C1294 Brake Lamp Switch Circuit Always Active

C1295 Brake Lamp Switch Circuit Open

U1016 Loss of Communications with PCM

U1255 Generic Loss Communications

U1300 Class 2 Circuit Shorted to ground Refer to Data Link Connector System Check in Wiring
System

U1301 Class 2 Circuit Shorted to battery Refer to Data Link Connector System Check in Wiring
System

RTD Real Time Damping page 3-136

C1650 ESC Module Malfunction

C1658 EEPROM calibration Malfunction

C1710 LF Shock Absorber Solenoid (Short to Voltage)

C1711 LF Shock Absorber Solenoid (Short to GND)

C1712 LF Shock Absorber Solenoid (Open Circuit)

C1715 RF Shock Absorber Solenoid (Short to Voltage)

C1716 RF Shock Absorber Solenoid (Short to GND)

C1717 RF Shock Absorber Solenoid (Open Circuit)

C1720 LR Shock Absorber Solenoid (Short to Voltage)

C1721 LR Shock Absorber Solenoid (Short to GND)

C1722 LR Shock Absorber Solenoid (Open Circuit)

C1725 RR Shock Absorber Solenoid (Short to Voltage)

C1726 RR Shock Absorber Solenoid (Short to GND)

C1727 RR Shock Absorber Solenoid (Open Circuit)

C1743 Loss of Vehicle Speed Signal

C1760 LF Position Sensor(Out of range)

C1761 RF Position Sensor(Out of range)

C1762 LR Position Sensor(Out of range)

C1763 RR Position Sensor(Out of range)

C1768 Position Sensor Supply malfunction(Overcurrent)

C1780 Loss of Steering Position Signal

C1786 RTD Control Relay Malfunction

C1787 RTD Control Relay Circuit (Open or Short to GND)

C1788 RTD Control relay Circuit (Short to Voltage)

C1790 Ride control switch(out of range)

C1791 Ride control switch(contact malfunction

40 BCM Body Control Module page 8-405 UTD Page 8-727

B0432 Rear Defogger Relay Circuit

B0433 Rear Defogger Relay Circuit

B0502 RH DRL Relay Circuit

B0503 RH DRL Relay Circuit

B0507 LH DRL Relay Circuit

B0508 LH DRL Relay Circuit

B0605 BCM Internal Memory Function

B0844 BCM Temporarily Inhibit ABS

B2403 Front Fog lamp Switch Circuit

B2408 Rear Fog Lamp Switch Circuit

B2482 Backup Lamp Relay Circuit

B2483 Backup Lamp Relay Circuit

B2527 Horn Relay Circuit

B2528 Horn Relay Circuit

B2573 Hatch Release Switch Circuit(Short to Voltage)

B2578 RF Turn Signal Monitor Circuit (Short to Voltage)

B2583 LF Turn Signal Monitor Circuit (Short to Voltage)

B2587 Column Lock/Unlock Drive (A)

B2588 Column Lock/Unlock Drive (A)

B2592 Column Lock/Unlock Drive (B)

B2583 Column Lock/Unlock Drive (8)

B2597 Traction Control System Switch Circuit

B2721 PASS-Key Detection Circuit

B2722 PASS-Key Detection Circuit

B2723 PASS-Key Detection Circuit

B2735 PASS-Key Programming Mode Active

U1016 Loss of Communication with PCM

U1096 Loss of Communications with IPC

U1255 Serial Data Line malfunction

60 IPC Instrument Panel Cluster page 3-508

B0516 Speedometer Signal Circuit Malfunction

B0521 Tachometer Signal Circuit Malfunction

B1512 DIC Switch 1 Signal Short to GND "FUEL'

B1517 DIC Switch 2 Signal Short to GND "GAGES"

B1522 DIC Switch 3Signal Short to GND "TRIP"

B1527 DIC Switch 4 Signal Short to GND "OPTIONS"

B1532 DIC Switch 5 Signal Short to GND "E/M"

B1537 DIC Switch 6 Signal Short to GND "RESET"

B1542 Oil Temperature Circuit Short to GND

B1543 Oil Temperature Circuit Open

U1016 Loss of Communications with PCM

U1040 Loss of Communication with TCS

U1056 Loss of Communications with RTD

U1064 Lose of Communications with DCM

U1128 Loss of Communications with radio

U1153 Loss of Communications with HVAC

U1160 Loss of Communications with LDCM

U1161 Loss of Communications with DCM

U1166 Loss of Communications with SCM

U1176 Loss of Communications with RFA

U1255 Serial Data Line malfunction

80 radio none found page 8-213

99 HVAC Heater Vent-Air Conditioning page 1-118

B0332 Outside Air Temp sensor Short to GND

B0333 Outside Air temp sensor open

B0337 Inside Air temp Sensor Short to GND

B0338 Inside Air temp sensor open

B0348 Sunload temperature sensor open

B0361 Left Actuator Feedback short to GND

B0363 Left Actuator Feedback Open

B0365 Right Actuator Feedback short to GND

B0367 Right Actuator Feedback Open

B0441 Left Actuator Out of Range

B0446 Right Actuator Out of Range

B1016 Loss of Communications with PCM (No State of Health Message)

U1064 Loss of Communications with DCM (No State of Health Message)

U1096 Loss of Communications with IPC (No State of Health Message)

U1255 Serial Data Line malfunction

A0 LDCM Left Door Control module page 8-904 to 8-951

B2202 Left Window Up Switch Fault DCM-LEFT

B2204 Left Window Down Switch Fault DCM-LEFT

B2206 Right Window Up Switch Fault DCM LEFT

B2208 Right Window Down Switch Fault DCM-L

B2222 LT Mirror Select Switch Fault DCM-LEFT

B2224 RT Mirror Select Switch Fault DCM-LEFT

B2226 Mirror Right Switch Fault DCM-LEFT

B2228 Mirror Left Switch Fault DCM-LEFT

B2232 Mirror Up Switch Fault DCM-LEFT

B2234 Mirror Down Switch Fault DCM-LEFT

B2236 Left Door lock Switch Fault DCM-LEFT

B2238 Left Door unlock Switch Fault DCM-LEFT

B2242 Memory 1 Switch Fault DCM-LEFT

B2244 Memory 2 Switch Fault DCM-LEFT

B2252 Key Cylinder Switch Fault DCM-LEFT

B2262 Horizontal Position Sensor Fit DCM-L

B2264 Vertical Position Sensor Fault DCM-L

B2272 Left Mirror Motor Fault DCM-L

B2274 Window Motor Fault DCM-LEFT

B2276 Door Lock Motor/Mirror Heater Fit DCM-L

B2282 Battery #1 Fault DCM-LEFT

B2284 Battery #2 Fault DCM-LEFT

B2286 +5v Reference Fault DCM-LEFT

A1 RDCM Right Door Control Module a page 8-904 to 8-051

B2203 Right Window Up Switch Fault DCM RIGHT

B2205 Right Window Down Switch Fault DCM-R

B2237 Right Door Lock Switch Fault DCM-RIGHT

B2239 Right Door Un-Lock Switch Fault DCM-RIGHT

B2253 Key Cylinder Switch Fault DCM-RIGHT

B2263 Horizontal Position Sensor Fit DCM-R

B2265 Horizontal Position Sensor Fault DCM-R

B2273 Right Mirror Motor Fault DCM-Right

B2275 Window Motor Fault DCM-Right

B2277 Door Lock Motor/Mirror Heater Fit DCM-R

B2283 Battery #1 Fault DCM-RIGHT

B2285 Battery #2 Fault DCM-RIGHT

B2287 +5v Reference Fault DCM-RIGHT

AC SCM Seat Control module page 8-1064 8-1082

B0846 Battery 2 Out of range

B0851 Battery 1 out of range

B2002 Fore/Aft Seat motor Open or Short to GND

B2007 Front Vert. Seat motor Open or Shorted

B2012 Rear Vert. Seat motor Open or Shorted

B2172 Seat Front Up Switch Shorted to GND

B2177 Seat Front Down Switch Shorted to GND

B2182 Seat Rear Up Switch Shorted to GND

B2187 Seat Rear Down Switch Shorted to GND

B2192 Seat Forward Switch Shorted to GND

B2197 Seat Reverse Switch Shorted to GND

B2605 Seat Front Vert Position Sensor Failure

B2606 Seat Rear Vert. Position Sensor Failure

B2607 Seat Horizontal Position Sensor Failure

B0 RFA Remote Function Actuation page 8-676

B0605 Receiver Internal memory malfunction -RFA

B2805 No Transmitters Programmed -RFA

C21 00 Left Front TPM Sensor Malfunction -TPM

C2105 Right Front TPM Sensor Malfunction -TPM

C2110 Right Rear TPM Sensor Malfunction -TPM

C2115 Left Rear TPM Sensor Malfunction -TPM

C2120 TPM System malfunction (No Sensors Received -TPM

C2121 TPM System Programming malfunction (No Sensors Programmed)-TPM

U1000 Loss of Communication Undetermined -RFA

U1016 Loss Of Communication with PCM (No SOH Message Received -RFA

U1064 Loss Of Communication with DCM (No SOH Message Received -RFA

U1096 Loss Of Communication with IPC (No SOH Message Received -RFA

U1255 Serial Data Line Malfunction -RFA

sabastian458

You sir, are being hosed. Have them explain how many hours they are charging you for the "diagnostics" they performed, and why they are charging you for it. Was there a quote for the diagnostics given to you before being performed? Some states require a autherized quote for work to be performed (either signed by the customer or an autherization number given over the phone)

The service column lock was a recall, remind them of it. Then let them know that you will have to call the NTSB. (Or you an just buy the sub $100 parts from a supporting vendor or Egay and fix it yourself in about 30 mins)
(A thread to help you with the column lock and has links to where you can buy the fix kit)
http://forums.corvetteforum.com/c5-t...ky-please.html

Have them explain these "check valves" they are wanting to replace for $1400, then have them give you the part numbers. The only check valves under or near the intake that I can currently think of is maybe the PCV valve? But that is right next to the throttle body basically and does not require the intake to be removed. I am not aware of anything under the intake that would need to be replaced other than the oil PSI sending unit or the Knock sensors. Not much else under there.




But lets get back you fixing your car. First and fore most, get it out of that service department. I personally would let them charge you more than maybe 1 hour of labor (even tho autozone or such would pull the codes for free) Also tell them NOT to do ANY thing, dont erase the codes either, but more than likely they will clear the codes.

P0300- random misfire.
Could be aslew of things or could be nothing. What fuel are you running? With 20k on the clock I assume the plugs are still stock OEM's? (I would go ahead an look into replacing the spark plugs with a set of NGK iridium's, if you replace the plug wires I personally recommend a set of Firecore wires or such.)

P0492- secondary air injection pump-
Here is possibly where they are talking about check valves, but they are not under the intake but on the side of exhaust manifolds. There is a possibility that they may have failed (carbon build up causing them to stick) Or the air pump has injested water.

P0121 - Throttle Position Sensor/Switch A Circuit Range/Performance Problem
This can be a tough one. Really need a scan tool or such to see what the TPS is reading. It could be a chaffed wire, water intrusion into the connector, or a internal short/open in the sensor itself. Less likely is a bad ECU (personally I would not consider the ECU as a possiblilty.) My personal experiance is a bad sensor, but when you replace it, you need to perform a relearn procedure and make sure you get the sensor to read the proper voltage when the throttle blade is closed. (I believe it should read .04 volts but you should double check that and not trust me 110%)


If you need any more help let us know! We can save you Thousands of dollars! [said in the annoying "As seen on TV" commercials voice]

jmc12

I can see the list I have is incomplete, were did you get the one with ALL the codes??

CaddyJimz06

Thank you very much! I will be heading to the stealership today to reclaim my car and discuss the diagnostic charge with them.

rbartick

My 2002 has only 13,000 on it and I'm the original owner. Anyway, get the car back, clear all of the codes using the DIC buttons, pull the battery cable for a few minutes, and then see if the codes return.

You bring your car to the dealer for an oil change? My TB and injectors are perfectly clean, yours are probably clean as well.

TheoZ

And if it still has the original battery, replace it whether it still starts the car or not.

2K3Z06

Reminds me of the time the ex, took her Explorer in for routine maintance. $2500 later she showed me the bill the next day. I was shocked. Belts and hoses, which in my opinion were fine. And 150 dollars for injector cleaning. I looked up the part number on the internet. It was a bottle of stuff you pour in the tank, which sold for 12 bucks. The other 138 dollars was for labor................. Basically robbery.

Take your car to someone else. Those guys are thieves. Preying on old people and women.

Try to find a corvette shop in your area.

stevedun

Sounds like possible P1415 and P1416 codes for stuck check valve. The P1416 valve is between the intake and firewall requiring intake removal to replace. Can just spray some oxygen sensor safe carburetor cleaner in the hose coming from the airbox to un-stick it and be done. You will know more when you pull your own codes. $200 for diagnostics is about 2 hours labor to read the DIC.

sprayed1998

God dealerships are horrible.

Paul 75 L82

1st choice = Corvette shop, 2nd choice a good Hot Rod shop.