irocznut

I have a 1992 Camaro RS with TBI. I just changed my tempture sensor because the plastic was broken and the wire harness was loose. I tried trhrowing in another solinoid for the egr that i had (USED) but same thing. My computer is giving me four codes as follows....PLEASE ANY HELP WOULD BE APPRECIATED) The car is runing real rough.

12....which is normal

15....Coolant tempture sensor (CTS) siganl voltage is low or high

23....Manifold Air Tempture sensor (MAF) Siganl Voltage Is low or high OR Throttle Position Sensor error OR Mixture Control Solinoid- Open or shut solenoid problems

32....Barometric pressure sensor (BARO) sensor circuit failure OR Exhaust Gas recirculation (EGR)Valve diagnbostics switch - closed during engine start up or open when egr flow requesed by ECM Or EGR/EVRV

PLEASE HELP!!!!!!!!!!!

Vader

Z-Nut,

The '12' is expected on a scan and doesn't necessarily indicate a problem (it CAN, however).

The '15' is for a Low Temperature Fault of the CTS. That usually occurs when the CTS resistance goes beyond 100K ohms. That can occur when the CTS circuit is open from a wiring problem or when the sensor is disconnected.

The '23' is for similar low temperature fault from the MAT sensor. Having both codes could indicate a power problem or wiring problem, including engine harness grounds.

The '32' is for an EGR fault, meaning the ECM did not detect an increase in MAP sensor voltage when the EGR was commanded on.

Trickster

Code 15= Coolant Temp Sensor Circuit (Low Temperature Indicated)

Code 23= Manifold Air Temperature (MAT) Sensor Circuit (Low Temperature Indicated)

Code 32= Exhaust Gas Recirculation Circuit

Notice that pin "A" on the CTS (15) & MAT (23) are both grounds and are linked together along with the TPS by a wire splice.

Trickster

code 23

Trickster

code 32

irocznut

How can I check the grounds. Im pretty good mechanically but I hate wires. Thats why I converted my 87 gta from tpi to carbed. (SO MUCH EASIER) but i wanted to keep my daily driver tbi. Please help me do this. I just came back from a friends house and when im at a light and stopped the car surges back and fourth. ANY IDEAS??

Trickster

Here is the secod page of these troubleshooting charts.

Trickster

code 23

Trickster

code 32