Engine Error
P0053
HO2S Heater Resistance (Bank 1 Sensor 1)
Severity
Low
Symptoms
Engine runs rich on cold start, check engine light
Common Causes
- Internal failure of O2 sensor heater
- High resistance in sensor connector
- Damage to sensor wiring
- Incorrect aftermarket sensor installed
How to Fix
- 1 Replace upstream O2 sensor with OEM part
- 2 Clean connector pins
- 3 Repair damaged wiring
- 4 Measure heater resistance with multimeter
Estimated Repair Cost
USD
$120
–
$350
OEM O2 Sensor: $150 - $350