Service Code Reference
CODE REFERENCE
| Fault Code | Code Definition | Circuit Test & Step | |
|---|---|---|---|
| KOEO Codes | |||
| 522 | Vehicle In Gear (Not In "P" or "N") During Self-Test | TD1 | |
| 621 | Shift Solenoid No. 1 (SS1) Circuit Failure | TC1 | |
| 622 | Shift Solenoid No. 2 (SS2) Circuit Failure | TC1 | |
| 624 | Electronic Pressure Control (EPC) Solenoid Or Driver Circuit Failure | TC10 | |
| 625 | Electronic Pressure Control (EPC) Driver Circuit Open In ECA | TC10 | |
| 634 | Manual Lever Position (MLP) Sensor Voltage Out Of Self-Test Range | TD1 | |
| 636 | Transmission Oil Temp (TOT) Sensor Voltage Out Of Self-Test Range | TE1 | |
| 637 | Transmission Oil Temp (TOT) Indicates -140F° (-40C°)/Circuit Open | TE10 | |
| 638 | Transmission Oil Temp (TOT) Indicates 290F° (143C°)/Circuit Grounded | TE20 | |
| Continuous Memory Codes | |||
| 452 | Insufficient Input From Vehicle Speed Sensor (VSS) | DP1 | |
| 617 | 1-2 Shift Error | TG90 | |
| 618 | 2-3 Shift Error | TG90 | |
| 619 | 3-4 Shift Error | TG90 | |
| 621 | Shift Solenoid No. 1 (SS1) Circuit Failure | TC30 | |
| 622 | Shift Solenoid No. 2 (SS2) Circuit Failure | TC30 | |
| 628 | Excess Converter Clutch Slippage | TG90 | |
| 634 | Manual Lever Position (MLP) Sensor Voltage Out Of Self-Test Range | TG90 | |
| 637 | Transmission Oil Temp (TOT) | ..... | |
| Indicates -140F° (-40C°)/Circuit Open | TG91 | ||
| 638 | Transmission Oil Temp (TOT) Indicates 290F° (143C°)/Circuit Grounded | TG91 | |
| 639 | Output Shaft Speed Sensor (OSS) Circuit Failure | TF90 | |
| 652 | Modulated/Converter Clutch Control (M/CCC) Circuit Failure | TC1 | |
| KOER Codes | |||
| 636 | Transmission Oil Temp (TOT) Sensor Voltage Out Of Self-Test Range | TE1 | |
| 639 | Output Shaft Speed Sensor (OSS) Circuit Failure | TF1 | |