Catalyst Temperature Sensor Circuit Bank 2 High (Generic)
The P4022 code means the vehicle's onboard diagnostic system has detected: Catalyst Temperature Sensor Circuit Bank 2 High (Generic). This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- hard
- Estimated cost
- $120 - $450 (parts and labor)
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Common Symptoms
- Check Engine Light on
- False high bank 2 catalyst temperature
- Engine power limited on bank 2
- Poor performance during towing
Probable Causes (Ranked by Likelihood)
- Short to voltage in bank 2 sensor circuit Very High
- Bank 2 sensor failure reading high High
- Wiring damage near bank 2 exhaust Moderate
- Reference voltage issue Low
Step-by-Step Diagnostic Procedure
-
Check sensor voltage with engine off
-
Disconnect sensor and test for stray voltage
-
Inspect wiring near bank 2 exhaust for heat damage
-
Verify reference voltage circuit
Frequently Asked Questions
Will P4022 prevent towing?
The engine power limitation from P4022 will reduce available power, making towing difficult or unsafe. Repair before towing heavy loads.
Can I drive with P4022?
You can drive short distances at reduced power. The engine management is protecting the catalyst from what it perceives as excessive heat.
Is P4022 common on trucks?
It is more common on trucks that tow frequently, as the higher exhaust temperatures accelerate wear on wiring and connectors near the catalytic converter.
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