i have a code for air temperture sensor circuit. will that be the reason my engine light is on. its the only current code displaying

 

Run a check of all your diagnostic codes and the DIC will tell all. Reset your "h" codes and you're good to go unless you get a persistent "c" meaning current condition.

http://myweb.accessus.net/~090/dtcobd2p.html#gmd
Scott

 

the air temp sensor cicuit is my persistant c . does the engine light go on when ever youhave any code

 

P0112 and P0113 WILL set check engine lights

 

dont even have them. not even in the h codes

 

No. Many codes will not trip the CE light.
Reset all your codes and see if it doesn't go out then. A fresh reset is often good to rule out old codes and see what's going on.
Scott

 

OK, specifically what codes do you have? There are a bunch of IAT codes, and the two listed above are the primary ones. I can't check them unless you tell me which codes you have.

 

And if it's a B0333 then no that won't cause a "check engine light"

 

the only code i have is bo333hc which i just tried to clear but comes back.
as i was clearing it , there was a noise in the dash sounded like it was coming from the air vent area

 

the codes i managed to clear were all H codes these are them, 10PCM- po200h, 28TCS- c1214h, AOLDCM- b2206h, b2282h, b2284h, u1064h, A1RDCM- b2283h, b2285h, u1064h

 

thanks

 

now that ive cleared all the h codes the light is gone. does this meanim ok, what would set it on in the first place

 

The P0200 code will set the check engine light. Here is a description of what happens. Notice the CEL will turn off if the diagnostic runs three times and does not find an error.

DTC P0200
Circuit Description
The control module enables the appropriate fuel injector on the intake stroke for each cylinder. Ignition voltage is supplied to the fuel injectors. The control module controls each fuel injector by grounding the control circuit via a solid state device called a driver. The control module monitors the status of each driver. If the control module detects an incorrect voltage for the commanded state of the driver, a fuel injector control DTC sets.

Conditions for Running the DTC
The engine speed is more than 400 RPM.
The ignition voltage is between 6-18 volts.
Conditions for Setting the DTC
The PCM detects an incorrect voltage on a fuel injector control circuit.
The condition exists for 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.

What is interesting is the codes you posted are voltage related. You should check the circuit grounds to the frame and from the battery to the frame. There are specific diagnostics for each code but it could be a battery or ground related problem with all of the codes showing up at the same time.

Bill

 

hey guys , all sorted thanks again fo r all your help. i dont know where id be with out this forum