P0422
Catalyst 2 Efficiency Below Threshold Bank 1
P0422 is an OBD-II diagnostic trouble code meaning: Catalyst 2 Efficiency Below Threshold Bank 1. Common causes: malfunction of the catalytic converter, malfunction of oxygen sensors. Estimated repair cost: $111–556.
Symptoms
- Increased fuel consumption
- Reduced engine power
- Check Engine Light Illuminates
- Unusual odor from the exhaust system
Causes
- Malfunction of the catalytic converter
- Malfunction of oxygen sensors
- Leaks in the exhaust system
- Mechanical damage to the catalytic converter
- Incorrect engine operation (misfire, lean/rich mixture)
How to Fix
- Check the condition of the catalytic converter
- Check the operation of oxygen sensors
- Eliminate leaks in the exhaust system
- Replace the catalytic converter if necessary
- Check engine operation for misfires
Related codes
Error P0422 by Vehicle Brand
FAQ
What does the P0422 code mean?
P0422 is an OBD-II diagnostic trouble code that indicates: Catalyst 2 Efficiency Below Threshold Bank 1
What causes a P0422 error code?
The most common causes of P0422 include: Malfunction of the catalytic converter; Malfunction of oxygen sensors; Leaks in the exhaust system; Mechanical damage to the catalytic converter.
How do I fix a P0422 diagnostic trouble code?
To fix P0422: Check the condition of the catalytic converter. Check the operation of oxygen sensors. Eliminate leaks in the exhaust system. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0422?
Limited driving only, diagnose soon
How much does it cost to fix P0422?
The estimated repair cost for P0422 is $111–556. Actual cost depends on your vehicle, location, and labor rates.
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