TROUBLE CODE DEFINITION
| Code No. | Circuit Affected |
|---|
| 12 (1) | No RPM Reference Pulse |
| 16 | Vehicle Speed Sensor |
| 21 | Throttle Position Switch Voltage High |
| 22 | Throttle Position Switch Voltage Low |
| 24 | Vehicle Speed Sensor Signal Low |
| 28 | Oil Pressure Switch Assembly Problem |
| 39 | (3) (4) (5) TCC Stuck OFF |
| 58 | Transmission Temperature High |
| 59 | Transmission Temperature Low |
| 66 | (5) 3-2 Control Solenoid Circuit |
| 67 | (5) TCC Solenoid Circuit |
| 68 | (3) (4) (5) Transmission Slipping |
| 69 | (5) TCC Stuck ON |
| 72 | Vehicle Speed Sensor Loss |
| 73 | (2) Pressure Control Solenoid Problem |
| 74 | (2) (3) (4) Transmission Input Speed Sensor Circuit |
| 79 | Transmission Fluid Too Hot |
| 80 | (3) (7) Transmission Slipping |
| 81 | (2) Shift Solenoid "B" Circuit Error |
| 82 | (2) Shift Solenoid "A" Circuit Error |
| 83 | (3) (4) TCC Solenoid Circuit Error |
| 84 | (2) 3-2 Control Solenoid Circuit |
| 85 | (3) (4) Undefined Ratio Error Problem |
| 85 | (2) (7) TCC Stuck ON |
| 86 | (3) (4) Low Ratio Error Problem |
| 87 | (3) (4) High Ratio Error Problem |
| 90 | (6) (7) TCC Stuck ON |
| 93 | (6) Pressure Control Solenoid Problem |
| (1) Display of a Code 12 is normal when no reference pulses are received by control module (engine not running). (2) Not on 3.4L Camaro and Firebird. (3) Applies to 1994 model year. (4) Applies to "C" and "K" light trucks only. (5) Not on passenger cars. (6) Used on 3.4L Camaro and Firebird only. (7) Used on passenger cars. |
| (1) | Display of a Code 12 is normal when no reference pulses are received by control module (engine not running). |
| (2) | Not on 3.4L Camaro and Firebird. |
| (3) | Applies to 1994 model year. |
| (4) | Applies to "C" and "K" light trucks only. |
| (5) | Not on passenger cars. |
| (6) | Used on 3.4L Camaro and Firebird only. |
| (7) | Used on passenger cars. |
PCM TROUBLE CODE DEFINITION
Note. Only transmission-mounted components related to transmission trouble codes are listed. If other trouble codes are present, see appropriate TESTS W/CODES article in ENGINE PERFORMANCE section.
