P1622
Oxygen Sensor Reference Voltage Circuit High
Severity
⚠️ MediumCan you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–89 (est.)
Symptoms
- Increased fuel consumption
- Unstable engine operation at idle
- Check Engine Light Illuminates
- Reduced engine power
- Increased emissions of harmful substances
Causes
- Oxygen sensor malfunction
- Open or short circuit in the sensor circuit
- Wiring Harness Problems
- Corrosion of sensor connector contacts
- Engine control unit malfunction
How to Fix
- Check the continuity of the oxygen sensor circuit
- Inspect connectors and contacts for corrosion
- Check sensor resistance and voltage
- If necessary, replace the oxygen sensor
- Check the operation of the computer