P0057

Symptoms

• Check Engine Light Illuminates
• Increased fuel consumption
• Unstable engine operation at idle
• Reduced engine power
• Increased emissions of harmful substances
• Difficulty starting on a cold engine

Causes

• Faulty oxygen sensor heater
• Open or short circuit in heater circuit wiring
• Corrosion or oxidation of sensor connector contacts
• Heater Circuit Fuse Malfunction
• Heater control relay problems
• Engine ECU malfunction
• Damage to wiring harness due to high temperature

How to Fix

1. Connect a diagnostic scanner and read all error codes
2. Check the condition of the engine control system fuses
3. Visually inspect the wiring to the oxygen sensor for damage.
4. Measure the resistance of the oxygen sensor heater (usually 2-14 ohms)
5. Check the supply voltage at the sensor connector with the engine running
6. Check the integrity of the sensor ground wire
7. If necessary, replace the faulty oxygen sensor
8. Repair damaged wiring or connectors
9. Clear error codes and test drive
10. Recheck the system with a diagnostic scanner

Related codes

Error P0057 by Vehicle Brand