Catalyst Temperature Sensor (Bank 2)
The P0435 code means the vehicle's onboard diagnostic system has detected: Catalyst Temperature Sensor (Bank 2). This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $80 - $300 (parts and labor)
Reads enhanced codes and shows real-time O2 sensor data. Verify the cat is actually bad before dropping $1,000+ on a replacement.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Common Symptoms
- Check Engine Light illuminated
- No noticeable drivability issues
- ECM cannot monitor Bank 2 catalyst temperature
- Failed emissions test
Probable Causes (Ranked by Likelihood)
- Faulty Bank 2 catalyst temperature sensor Very High
- Open or shorted Bank 2 sensor wiring High
- Corroded Bank 2 sensor connector Moderate
- ECM Bank 2 sensor input circuit fault Low
Step-by-Step Diagnostic Procedure
-
Read Bank 2 catalyst temperature PID on a scan tool -- should increase as the engine warms up
-
Inspect the Bank 2 sensor connector for corrosion
-
Measure sensor resistance at various temperatures and compare to specifications
-
Check wiring continuity from sensor to ECM
-
Replace the sensor if readings are out of specification
Frequently Asked Questions
Can I drive with code P0435?
Yes. The Bank 2 catalyst temperature sensor fault does not affect engine performance. Catalyst monitoring on Bank 2 is disabled until repaired.
Is P0435 the Bank 2 equivalent of P0425?
Yes. P0425 covers the Bank 1 catalyst temperature sensor and P0435 covers Bank 2. Diagnostics are the same on the opposite exhaust bank.
Where is the Bank 2 catalyst temperature sensor?
It is threaded into the exhaust pipe near the Bank 2 catalytic converter. On V6 and V8 engines, Bank 2 is the side opposite cylinder 1.
Sources
This page is built from documented references. Verify against your own service info before repair work.
Explore More
Was this helpful?
Send this to whoever is fixing the car — your mechanic, or the person asking what the light means.