Fault code P0706 – a step-by-step guide to diagnosing and fixing it

Error code P0706 is displayed and the check engine light is on - what does this mean?

The OBD system detects a fault in the transmission range sensor (transmission range sensor). This DTC P0706 indicates a range or performance error in the sensor that transmits the position of the gearshift to the transmission control unit. For various manufacturers, this error code can also be referred to as a PRNDL sensor error.

What causes can this error code have?

• Defective transmission selector lever position sensor
• Damaged or corroded plug connections
• Interrupted or short-circuited cables to the sensor
• Faulty wiring in the sensor circuit
• Defective transmission control unit (TCM)
• Mechanical problems on the gearshift or linkage
• Worn or incorrectly adjusted sensor bracket
• Faulty power supply to the sensor

Which symptoms occur in parallel with error code P0706?

• Starting problems: The vehicle can only be started in certain gear positions
• Shifting problems: Automatic transmission shifts irregularly or gets stuck in a gear
• Reversing light malfunction: Reversing lights do not work properly
• Cruise control failure: Cruise control system deactivates automatically
• Gear indicator problems: Incorrect or no display of the current gear position in the instrument cluster
• Emergency running program: Transmission switches to safety mode with limited functionality

How can the problem with error code P0706 be rectified?

• The repair requires a systematic approach to identify the exact source of the fault.
• Replace the sensor: Completely replace the faulty transmission selector lever position sensor and calibrate it correctly to restore gear position detection
• Repair wiring: Check all cables and plug connections to the sensor for damage, replace defective cables and clean or renew contacts
• Carry out sensor adjustment: Check the mechanical position and attachment of the sensor and readjust according to the manufacturer's specifications
• Replace transmission control unit: If the TCM is defective, replace the entire control unit and have it programmed with vehicle-specific software
• Repair shift linkage: Check mechanical components of the shift lever and connecting linkage for wear and replace if necessary