Catalyst Temperature Sensor Range/Performance (Bank 2)
The P0436 code means the vehicle's onboard diagnostic system has detected: Catalyst Temperature Sensor Range/Performance (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.
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Common Symptoms
- Check Engine Light illuminated
- No drivability symptoms
- Bank 2 catalyst monitoring disabled
- Failed emissions test
Probable Causes (Ranked by Likelihood)
- Degraded Bank 2 catalyst temperature sensor Very High
- Carbon buildup on the Bank 2 sensor tip High
- Intermittent wiring issue on Bank 2 sensor circuit Moderate
- Exhaust leak near the Bank 2 sensor Low
Frequently Asked Questions
Can I drive with code P0436?
Yes. The sensor performance issue does not affect engine operation. ECM disables Bank 2 catalyst temperature monitoring until repaired.
Is P0436 the Bank 2 version of P0426?
Yes. P0426 is Bank 1 catalyst temperature sensor range/performance and P0436 is the equivalent for Bank 2.
How long does the catalyst temperature sensor last?
Catalyst temperature sensors typically last 100,000-150,000 miles. Exposure to extreme heat and exhaust gases gradually degrades the sensing element over time.
Mechanics Guide Step-by-step diagnosis
Step-by-Step Diagnostic Procedure
-
Monitor Bank 2 catalyst temperature during warm-up and compare to expected values
-
Compare sensor reading to an infrared thermometer measurement at the exhaust pipe
-
Inspect the sensor for heavy soot buildup
-
Check for exhaust leaks near the sensor
-
Replace the sensor if response time is slow or readings do not track actual temperature
Sources 1
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
Commonly Affected Vehicles
- 2005-2017 Toyota Tundra V8
- 2004-2016 Lexus GS 430
- 2006-2018 Nissan Titan
- 2003-2015 Subaru Outback H6
- 2007-2019 Toyota Sequoia
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