OK, it all started out with what felt like a TPS problem. From idle or off-idle she would stumble or do nothing at all and suddenly send the tires up in a blaze of smoke. A couple days later she started sputtering and missing badly. Then, for no apparent reason she would straiten up and run like a champ.

I found several articles on the forum about ground wire corrosion which helped quite a bit, thank you to those guys. But she's still acting up and throwing codes. Below are several days worth of codes. After recording these I cleared them.

While checking and cleaning connections I unplugged the main computer as well as the one below the carpet on the passenger floorboard. After reconnecting everything including the batter it wouldn't crank at all. I eventually disconnected the harnesses from the computer under the passenger floorboard and it finally would crank and start. I drove her for a few days but when I parked her yesterday she went back to that computer thing where she won't crank at all.


Idea's?
She's dead right now and I'm getting the itch.

OBD II
Diagnostic Trouble Codes: (DTC)

2001 Corvette, Recorded September 07, 2005
A6 SCM (1 Code)
B2605H Seat Front Vert. Position Sensor Failure

10-PCM (3 Cods)
P0131C HO2S Circuit Low Voltage Bank 1 Sensor 1
P0151H Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 2 Sensor 1
P0174H Fuel Trim System Lean Bank 2
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2001 Corvette, Recorded August 29, 2005
10-PCM (3 Codes)
P0154 HO2S Circuit Insufficient Activity Bank 2 Sensor 1
P0155 HO2S Heater Performance Bank 2 Sensor 1
P0174 Fuel Trim System Lean Bank 2
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2001 Corvette, Recorded August 28, 2005
10-PCM (2 Codes)
P0151 Heated Oxygen Sensor (HO2S) Circuit Low Voltage Bank 2 Sensor 1
P0174 Fuel Trim System Lean Bank 2
----------------------------------------------------------------------------------------------
2001 Corvette, Recorded August 24, 2005
10-PCM (1 Code)
P1514H TAC System MAF Performance

60 IPC (6 Codes)
U1160H Loss of Communications with LDCM
U1040H Loss of Communications with TCS
U1016H Loss of Communications with PCM
U1064H Loss of Communication with DCM
U1088H Loss of Communication with SDM
U1176H Loss of Communications with RFA

80 Radio (3 Codes)
U1064H Loss of Communication w/ DCM
U1096H Loss of Communications with IPC
U1016H Loss of Communication with PCM

AO-LDCM (7 Codes)
B2208H Right Window Down Switch Fault
B2282H Battery #1 Fault
B2284H Battery #2 Fault
U1255H Serial Data Line Malfunction
U1064H Loss of Communication w/ DCM
U1016H Loss of Communication with PCM
U1096H Loss of Communications with IPC

28TCS (2 Codes)
C1278H TCS Temporarily Inhibited By PCM
C1293H DTC C1291/C1292 Set Curnt/Prev Ign Cycle

 

WOW!!!!!!!!!!!! I thought my 98 coupe had NASTY codes!!!

Disconnect the battery for 5 minutes. Clean both battery terminals and spray out the connections with brake parts cleaner followed by a good douse of WD-40. Retorque the battery cables on to the battery with a torque wrench to 11 ft/lbs. Turn on the key and read the battery voltage on the dash meter and digitaly on the DIC. Report those voltages. Read the battery with a Volt/ohm meter at the terminals and report that voltage. If it is much less than 11.9 -11.5 the battery could be bad. Turn the key or have some one turn the key and start the engine and watch the Volt/ohm meter that is connected at the battery terminals. It should NOT drop below 11.0 volts wnen you start the car.

After you attempt to start the car, go back and read all of the DTC codes in the DIC and post them.

bill curlee

 

Thank you very much, Bill!

I'll do this tonight.

 

Bill,
I did just that and even tried a new Ultima battery but to no avail. This morning she was doing the hesitation thing from idle and when I got into the throttle around 60mph, I mean as soon as I tapped it she went into reduced power mode and blew these errors.

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2001 Corvette, Recorded September 16, 2005
10-PCM (1 Code)
P1514HC TAC System MAF Performance

28TCS (1 Code)
C1278H TCS Temporarily Inhibited By PCM

A6 SCM (1 Code)
B2605H Seat Front Vert. Position Sensor Failure

Any idea's? Some are repetitive but the seat thing really throws me off here.
Thanks Again!

 

This may sound real strange but try it!! Disconnect the electrical connection on your MAF and take it for a drive. See if it drives better. You will get a code and the check engine light but ignor it.

After you test that theory, hook everything back up and clear all of the codes.

Report your results.

Bill

 

Well, Bill, I'm trying but now it's back to not turning over at all. One of the computers needs reset and I can't seem to get it done. I disconnected the batter for five minutes, nothing, then an hour, nothing. I reconnected the batter and disconnected the computer under the passenger floor for five minutes and still nothing. I'm getting frustrated wth our electronics here. How is we can we make such a high performance car but can't keep it on the road. I guess maybe that's how we keep the price down. Just really frustrated right now that I finally got a weekend off and can't enjoy it.

Well, thanks much for the help. I'll keep goofing with it.

Take Care!

 

OK,
Last night it was so bad the tranny began to overheat. Basically, the computer stopped managing the line pressures which I've seen before. So I dropped it in 3rd and babied it home about 55mph. She cooled down and stopped the RPM climbing up and down.

I parked it and this morning when I attempted to start it up, nothing! Lights and guages but wouldn't turn at all. One of the computers is on the blitz again. I tried resetting it a few times (battery disconnect 5-10 minutes) and finally after leaving it disconnected for over an hour she started. However, she only runs in Reduced Power Mode and blew the errors below.

----------------------------------------------------------------------------------------------
2001 Corvette, Recorded September 17, 2005
10-PCM (1 Code)
P1514HC TAC System MAF Performance

28TCS (1 Code)
C1278H TCS Temporarily Inhibited By PCM

40BCM (3 Codes)
B0507H LH DRL Relay Circuit
B2587H Column Lock/Unlock Drive (A)
B2592H Column Lock/Unlock Drive (B)

A6 SCM (1 Code)
B2605H Seat Front Vert. Position Sensor Failure
U1255H Serial Data Line Malfunction