P017A

Symptoms

• Unstable engine operation
• Increased fuel consumption
• Reduced engine power
• Check Engine Light

Causes

• Malfunction of the cylinder head temperature sensor
• Open or shorted wiring harness
• Poor contact in sensor or ECU connector
• Damage to wire insulation
• Malfunction of the engine control unit (rare)

How to Fix

1. Visually check the wiring harness and sensor connector for damage.
2. Measure the sensor resistance at different temperatures (compare with nominal values)
3. Check reference voltage and continuity using a multimeter
4. Replace the faulty head temperature sensor if necessary
5. Clean or replace damaged connectors/wires
6. Reset the error and check for its reappearance

Related codes

Error P017A by Vehicle Brand