Check Engine Code 23
05-27-2004, 10:40 PM
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Car: 89 RS with 350
Engine: 5.7
Transmission: auto
Check Engine Code 23
Low temp @ manifold air temp sensor OR throttle position sensor error...what exactaly does it mean? And...what do I need to get to fix it? I was driving on the highway at 60MPH then the choke light came on, then the check engine came on.. I am unsure at this point. Any help?
05-28-2004, 08:43 PM
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Car: 82 ElCamino, looking for a 3rd gen
Engine: 305 TPI(427SB in progress) 730 $8D
Transmission: THM350 (Getting a 4L80E soon)
Axle/Gears: 10 Bolt w/ 2.43 gears :(
Depending on what fuel system you have 23 can mean any of the following.
23 M/C solenoid fault (Carbureted)
23 MAT sensor Low temperature fault (EFI/TPI/SFI)
23 EST bypass circuit fault (Cadillac DFI)
Since you info says LG4 im going to say that the M/C(mixture control) solenoid in the carb has taken a vacation or there is a wiring/ECM problem.
23 M/C solenoid fault (Carbureted)
23 MAT sensor Low temperature fault (EFI/TPI/SFI)
23 EST bypass circuit fault (Cadillac DFI)
Since you info says LG4 im going to say that the M/C(mixture control) solenoid in the carb has taken a vacation or there is a wiring/ECM problem.
thanks.
05-29-2004, 12:14 AM
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Car: 1989 Iroc-Z
Engine: 5.7L TPI
Transmission: 700R4
Welome to the board Richiehedd. On your car, code 23 means Intake Air Temp Sensor (IAT). Here is the trouble shooting chart for it.
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05-29-2004, 07:50 AM
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Car: 1990 Camaro Iroc-Z
Engine: 305 TPI
Transmission: T-5 manual
thank you very much, car is sputtering when it gets up to temperature and really drives like crap. hopefully its just the iat. thanks again. keep ya posted.
05-29-2004, 10:01 AM
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Car: 89 RS with 350
Engine: 5.7
Transmission: auto
my problem is fixed, having a broken belt caused the code 23...found it last night, replaced it and now its fine
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