Hi I hope someone would be able to help me with this. I had to replace the Idle pully in my 2000 vert. while doing so I also replaced the serpintin Belt while there I also replaced the air filter. I put everything togeather started the car and after about 6miles of driving a check engine light came on, I disconnected the batt. thinking that reseting it may clear it. When that did not work I did a diagnosting on the DIC a few codes came up.P0113H-C,C1235H,C1255H,U1016H.U1064H,They all had An "H" except one B0338 it had C & H. I was able to clear them, Then I go out drive the car and without failure after 6 miles the CHECK ENGIN LIGHT comes back on. The car was fine before I touched the engine compartment. I had to change the pully because it looked as if it was coming apart at the seames and the belt was going to slip off.
any Ideas?
Thank you in advance

 

B0338 Inside Air temp sensor open


It's a small sensor located in the intake bridge. You might have disconnected this for servicing the filter or damaged the wires and or sensor in the process of either the filter change or the pulley/belt. Insure it's plugged in and if so follow the wires to the block to make sure they are not damaged... If all looks ok, acquire sensor from either parts house or gm parts dealer (i'll bet it's dealer only)

did you hook this back up???

 

Thanks
I have checked all the wireing to filter intake and my next step was to replace the sensor if I could locate it

 

that should do it

 

B0333 has nothing to do with your check engine light. It's for the Ambient Air temp sensor for the HVAC. That is located in front of the radiator shroud on the passenger side. P0113 is for the Intake Air Temp Sensor. The other two codes are for ABS issues.

Here are the descriptions of the functions and how the codes are set. Maybe you can find some connectors that were not reconnected correctly.

DTC B0332, B0333, B0337, or B0338

Circuit Description
The following DTCs are for the ambient air temperature sensor and for the inside air temperature sensor:
• B0332 and B0333 are for the ambient air temperature sensor
• B0337 and B0338 are for the inside air temperature sensor
The ambient air temperature sensor allows the HVAC control module to monitor the temperature of the air surrounding the front of the vehicle. The inside air temperature sensor allows the HVAC control module to monitor the temperature of the air inside the passenger compartment. The module applies 5 volts to internal input resistors that are connected to the signal circuits of the air temperature sensors. The module provides ground to the air temperature sensors through the low reference circuits. The HVAC control module monitors the voltage drops across the air temperature sensors and uses the inputs for automatic control calculations. The HVAC control module also uses the ambient air temperature input to calculate the value of the ambient air temperature display. When the air temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the air temperatures are hot, the resistances of the sensors are low and the voltage signals are low.

Conditions for Running the DTC
The ignition is turned ON.

Conditions for Setting the DTC
The HVAC control module determines that the voltage applied to the input for the air temperature sensor is less than 0.09 V, for B0332 and B0337, or more than 4.9 V, for B0333 and B0338.

Action Taken When the DTC Sets
• The HVAC control module will store the trouble code in memory.
• A default value will be used for the sensor data by the HVAC control module to allow the A/C system to operate.

Conditions for Clearing the DTC
• The DTC will become history if the HVAC control module no longer detects a failure.
• The history DTC will clear after 100 fault free ignition cycles.
• The DTC can be cleared with a scan tool.

DTC P0113

Circuit Description
The intake air temperature (IAT) sensor is a variable resistor. The IAT sensor has a signal circuit and a low reference circuit. The IAT sensor measures the temperature of the air entering the engine. The powertrain control module (PCM) supplies 5 volts to the IAT signal circuit and a ground for the IAT low reference circuit. When the IAT sensor is cold, the sensor resistance is high. When the air temperature increases, the sensor resistance decreases. With high sensor resistance, the PCM detects a high voltage on the IAT signal circuit. With lower sensor resistance, the PCM detects a lower voltage on the IAT signal circuit. If the PCM detects an excessively high IAT signal voltage, indicating a low temperature, DTC P0113 sets.

Conditions for Running the DTC
• DTCs P0101, P0102, P0103, P0116, P0117, P0118, P0125, P0128, P0502, P0503 are not set.
• The engine run time is more than 120 seconds.
• The vehicle speed sensor (VSS) indicates that the vehicle speed is less than 11 km/h (7 mph).
• The engine coolant temperature (ECT) is more than 60°C (140°F).
• The mass air flow (MAF) is less than 15 g/s.

Conditions for Setting the DTC
The PCM detects that the IAT Sensor parameter is less than -38°C (-36°F) for more than 5 seconds.

Action Taken When the DTC Sets
• The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
• The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

Conditions for Clearing the MIL/DTC
• The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Clear the MIL and the DTC with a scan tool.

Diagnostic Aids
• When the vehicle is at ambient temperature the IAT sensor and the ECT sensor temperatures should be relatively close to each other. Refer to Temperature vs Resistance .
• If a short to a separate 5-volt source occurs this DTC may set.
• If an intermittent condition is suspected, refer to Intermittent Conditions .

DTC C1221-C1235

Circuit Description
As the wheel spins, the wheel speed sensor produces an AC signal. The electronic brake control module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.

Conditions for Running the DTC
C1221 through C1228
• DTCs C1232 through C1235 are not set.
• The brake pedal is not pressed.
• The ABS is not active.
C1232 through C1235
The ignition is ON.

Conditions for Setting the DTC
C1221 through C1224
All of the following conditions exists for 2.5 seconds:
• The suspect wheel speed equals zero.
• The other wheel speeds are greater than 8 km/h (5 mph).
• The other wheel speeds are within 11 km/h (7 mph) of each other.
C1225 through C1228
The EBCM detects a rapid variation in the wheel speed. The wheel speed changes by 16 km/h (10 mph) or more in 0.01 second. The change must occur 3 times with no more than 0.2 seconds between occurrences.
C1232 through C1235
One of the following conditions exists for 0.02 seconds:
• A short to voltage - the wheel speed sensor signal circuit and wheel speed sensor return circuit voltages are both greater than 4.25 volts.
• A short to ground - the wheel speed sensor signal circuit and wheel speed sensor return circuit voltages are both less than 0.75 volts.
• An open - the wheel speed sensor signal circuit voltage is greater than 4.25 volts and wheel speed sensor return circuit voltage is less than 0.75 volts.

Action Taken When the DTC Sets
If equipped, the following actions occur:
• The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle.
• The DRP does not function optimally.
• The ABS indicator turns ON.
• The Traction Control and Active Handling indicator turns ON.
• The DIC displays the following messages:
o Service ABS
o Service Traction System
o Service Active Handling

Conditions for Clearing the DTC
• The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
• The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
C1221 through C1224
Under the following conditions, 2 Wheel Speed Sensor Input is 0 DTCs are set:
• The 2 suspect wheel speeds equal zero for 60 seconds.
• The other wheel speeds are greater than 16 km/h (10 mph).
• The other wheel speeds are within 11 km/h (7 mph) of each other.
Diagnose each wheel speed sensor individually.
C1225 through C1228
A possible cause of this DTC is electrical noise on the wheel speed sensor harness wiring. Electrical noise could result from the wheel speed sensor wires being routed to close to high energy ignition system components, such as spark plug wires.
C1232 through C1235
If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion. If the DTC is not current, clear all DTCs and simulate the effects of water intrusion by using the following procedure:
1. Spray the suspected area with a 5 percent saltwater solution. To create a 5 percent saltwater solution, add 2 teaspoons (9.9 ml) of salt to 354 ml (12 oz) of water.
2. Test drive the vehicle over various road surfaces (bumps, turns, etc.) above 40 km/h (25 mph) for at least 30 seconds.
3. If the DTC returns, replace the suspected wheel speed sensor or repair the wheel speed sensor wiring.
4. Rinse the area thoroughly when completed.
DTC C1255 or C1256

Circuit Description
This DTC identifies a malfunction within the electronic brake control module (EBCM).

Conditions for Running the DTC
The ABS conditions and the braking conditions are normal.

Conditions for Setting the DTC
An internal EBCM malfunction exists.

Action Taken When the DTC Sets
C1255
If equipped, the following actions occur:
• The EBCM disables the DRP/ABS/TCS/VSES for the duration of the ignition cycle.
• The ABS indicator turns ON.
• The Traction Control and Active Handling indicator turns ON.
• The red Brake warning indicator turns ON.
• The DIC displays the following messages:
o Service ABS
o Service Traction System
o Service Active Handling
• The EBCM will also set DTC C1248.
• For some DTC C1255xx, the EBCM disables the variable effort steering (VES) for the duration of the ignition cycle.
C1256
• The ABS remains functional.
• The ABS indicator remains OFF.

Conditions for Clearing the DTC
• The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
• The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids
• The scan tool displays 2 additional characters after the DTC. Take note of the 2 character code and any other DTCs that are set. The 2 character code is an engineering aid used in order to determine the cause of the internal malfunction.
• When the scan tool displays DTC C1255m3, the EBCM has not been programmed. Perform the setup procedure for the EBCM.


Bill

 

i feel retarded...

Thanks bill for the correction...

 

Bill
Thank's you gave me allot of good info, I have clearead all of the codes. While driving I notice that the light is not lit once I shut the the car off & start the car up a 2nd time. the light comes back, I have also notice that when I clear the code P0113 & code P1111 the check engine ligtht goes off. with your help and other member here I was able to correct the issue It was a deffective sensor, in the IAT is was detecting low volatage. Thanks again to all I just got it fixed 0n Saturday2-24-07.

 

If the P0113 comes back again go here:http://forums.corvetteforum.com/show....php?t=1621225