4L80-E Automatic Transmission
DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATIONThe Malfunction Indicator Lamp (MIL) will be "ON" if an emission malfunction exists. If the malfunction clears, the lamp will go "OFF" and the DTC will be stored in the Powertrain Control Module (PCM). Any DTC(s) stored will be cleared if no problem recurs within 50 engine starts.
DTC NUMBER AND NAME
DTC 24 - Vehicle Speed Sensor Circuit Low (Output Speed Signal)
DTC 28 - Trans Range Pressure Switch Circuit
DTC 37 - Torque Converter Clutch (TCC) Brake Switch Stuck "ON"
DTC 38 - TCC Brake Switch Stuck "OFF"
DTC 39 - TCC Brake Switch Stuck "OFF"
DTC 51 - Programmable Read Only Memory (PROM) Error
DTC 52 - System Voltage High Long
DTC 53 - System Voltage High
DTC 58 - Trans Fluid Temp Circuit Low
DTC 59 - Trans Fluid Temp Circuit High
DTC 68 - Transmission Component Slipping
DTC 69 - TCC Stuck "ON"
DTC 72 - Vehicle Speed Sensor Circuit Loss (Output Speed Signal)
DTC 73 - Pressure Control Solenoid Circuit (Current Error)
DTC 74 - Trans Input Speed Sensor Circuit (Current Error)
DTC 75 - System Voltage Low
DTC 79 - Trans Fluid Overtemp
DTC 81 - 2-3 Shift Solenoid Circuit
DTC 82 - 1-2 Shift Solenoid Circuit
DTC 83 - TCC PWM Solenoid Circuit Fault
DTC 84 - Accelerator Pedal Position Circuit Fault
DTC 85 - Undefined Ratio Error
DTC 86 - Low Ratio Error
DTC 87 - High Ratio Error
NOTE: For additional diagnostic trouble codes refer to Computers and Control Systems / System Diagnosis. Testing and Inspection