Fault code P0183 – a step-by-step guide to diagnosing and fixing it

Error code P0183 is displayed and the check engine light is on - what does this mean?

The OBD/EOBD system has detected a fault in the fuel temperature sensor circuit where the signal is too low. This DTC P0183 affects the fuel supply system and can impair engine performance. The exact designation may vary for different manufacturers, but the basic function remains the same.

What can cause this error code?

• Defective fuel temperature sensor
• Damaged wiring to the sensor
• Corroded or loose plug connections
• Short circuit in the sensor cable
• Defective engine control unit (ECM)
• Interruption in the ground cable
• Dirt or corrosion on the sensor contact

What symptoms occur in parallel with fault code P0183?

• Check engine light: Permanent activation of the check engine light
• Starting problems: Delayed or difficult starting in cold temperatures
• Rough engine running: Especially at low outside temperatures
• Increased fuel consumption: Inefficient fuel-air mixture formation
• Power loss: Reduced engine power during the warm-up phase
• Exhaust problems: Increased emission values during the emissions test

How can the problem of error code P0183 be rectified?

• The repair requires a systematic diagnosis to identify the exact cause.
• Replace the fuel temperature sensor completely and use new seals to prevent further leaks
• Check the wiring to the sensor for damage and replace defective cable sections with new cables
• Clean plug connections, treat with contact spray and screw tight or install new plugs
• Carry out a multimeter test of the sensor values and replace the entire sensor system if there are deviations
• Check engine control unit for functionality and reprogram or replace if necessary
• Test the ground cable for continuity and make a new ground connection if there is an interruption