Transmission Codes

Transmission Over Temperature Condition

Transmission fluid temperature has exceeded safe limits. Overheating causes accelerated wear and eventual transmission failure.

Transmission Control System Malfunction

General fault in the transmission control system. This is usually accompanied by other transmission-specific codes.

Input/Turbine Speed Sensor Circuit Malfunction

The input shaft speed sensor has a circuit fault.

Output Speed Sensor Circuit Malfunction

The output shaft speed sensor has a circuit fault.

Incorrect Gear Ratio

The transmission is not achieving the expected gear ratio.

Gear 1 Incorrect Ratio

First gear is not achieving the correct ratio.

Gear 2 Incorrect Ratio

Second gear is not achieving the correct ratio.

Gear 3 Incorrect Ratio

Third gear ratio is incorrect.

Gear 4 Incorrect Ratio

Fourth gear ratio is incorrect — common on highway driving.

Shift Solenoid C Malfunction

Shift solenoid C failure or circuit fault.

Shift Solenoid D Malfunction

Shift solenoid D failure.

Shift Solenoid E Malfunction

Shift solenoid E fault. Some transmissions use up to 5 shift solenoids for complex gear selection.

Torque Converter Clutch Circuit Malfunction

The torque converter clutch (TCC) circuit has a fault. The TCC locks the torque converter at highway speeds for better fuel economy.

Shift Solenoid A Malfunction

Shift solenoid A has failed or its circuit has a fault. Shift solenoids control hydraulic fluid flow to engage transmission gears.

Shift Solenoid B Malfunction

Shift solenoid B has failed. Controls different gear combinations than solenoid A.

Torque Converter Clutch Performance/Stuck Off

The TCC is not engaging when commanded. The ECU commands lockup but the converter is not locking.

Torque Converter Clutch Stuck On

The TCC is locked when it should not be. This causes stalling when coming to a stop.

Transmission Fluid Temperature Sensor Circuit High

Transmission temperature sensor at maximum reading.

Transmission Fluid Temperature Sensor Circuit

Fault in the transmission fluid temperature sensor circuit. The TCM uses this sensor to adjust shift strategy based on fluid temperature.

Transmission Fluid Temperature Sensor Range/Performance

The transmission temperature sensor reading is outside expected range.

Transmission Fluid Temperature Sensor Circuit Low

Transmission temperature sensor reading is at minimum, indicating sensor or circuit fault.

Transmission Range Sensor Circuit Malfunction

Faulty neutral safety switch