P0438
Catalyst Temperature Sensor Circuit High Bank 2 Sensor 1
P0438 is an OBD-II diagnostic trouble code meaning: Catalyst Temperature Sensor Circuit High Bank 2 Sensor 1. Common causes: malfunction of the catalytic converter temperature sensor, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- Check Engine light comes on
- Reduced engine efficiency
- Increased fuel consumption
- Increased level of harmful emissions
Causes
- Malfunction of the catalytic converter temperature sensor
- Open or short circuit in wiring harness
- Problems with contacts in the electrical circuit
- ECU malfunction
How to Fix
- Check the condition of the wiring harness and sensor contacts
- Test the catalytic converter temperature sensor
- Replace sensor if necessary
- Check the integrity of the electrical circuit
- Reset the error and re-test
Related codes
Error P0438 by Vehicle Brand
FAQ
What does the P0438 code mean?
P0438 is an OBD-II diagnostic trouble code that indicates: Catalyst Temperature Sensor Circuit High Bank 2 Sensor 1
What causes a P0438 error code?
The most common causes of P0438 include: Malfunction of the catalytic converter temperature sensor; Open or short circuit in wiring harness; Problems with contacts in the electrical circuit; ECU malfunction.
How do I fix a P0438 diagnostic trouble code?
To fix P0438: Check the condition of the wiring harness and sensor contacts. Test the catalytic converter temperature sensor. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0438?
Limited driving only, diagnose soon
How much does it cost to fix P0438?
The estimated repair cost for P0438 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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