Fault code P0710 – a step-by-step guide to diagnosing and fixing it

Error code P0710 is displayed and the check engine light is on - what does this mean?

DTC P0710 is recognized by the OBD/EOBD system when there is a problem with the transmission fluid temperature sensor. This fault code indicates that the engine control unit has detected an implausible value or a malfunction in the transmission fluid temperature sensor circuit. For various manufacturers, this code may also be referred to as "Transmission Fluid Temperature Sensor Circuit Malfunction".

What causes can this error code have?

• Defective transmission fluid temperature sensor
• Damaged or corroded cable connections to the sensor
• Loose or poor plug connections on the sensor
• Short circuit or interruption in the wiring
• Defective transmission control unit (TCM)
• Contaminated or insufficient transmission oil
• Mechanical damage to the sensor due to overheating
• Faulty ground or voltage supply

What symptoms occur in parallel with fault code P0710?

• Shifting problems: The automatic transmission shifts irregularly or jerkily
• Emergency program: The transmission switches to safety mode with limited gears
• Starting problems: The vehicle may not start or may not run smoothly
• Overheating: The transmission may overheat because the temperature monitoring is faulty
• Loss of power: Reduced engine power and poor acceleration
• Warning lights: In addition to the engine warning light, the transmission warning light may also come on

How can the problem with error code P0710 be rectified?

• Repairing error code P0710 requires a systematic diagnosis and targeted measures.
• Check the transmission oil level and condition: Check the oil level and quality of the transmission oil, replace it if necessary and ensure that the correct type of oil is being used
• Replace temperature sensor: Replace the defective transmission oil temperature sensor with an original part and make sure it is fitted correctly with the prescribed torque
• Repair wiring: Check all cable connections to the sensor, repair damaged cables and thoroughly clean corroded contacts
• Replace plug connections: Replace defective plug connections, use contact spray for cleaning and establish a secure connection
• Check the transmission control unit: Have the TCM diagnosed by a specialist workshop and repaired or replaced if necessary
• Complete system diagnostics: Carry out a comprehensive diagnosis of the entire transmission system to identify and rectify other hidden problems