What are the common causes of P0436?

A catalyst temperature sensor on bank 2 sensor 1 reading implausibly. An erratic sensor signal. Corrosion at the sensor connector. A restricted bank 2 converter trapping heat. An ECM fault skewing the reading.

Compare the sensor reading to a cold start value. Inspect the sensor connector for corrosion. Check the bank 2 converter for a restriction. Verify the sensor is the correct part. Replace the sensor if the reading stays off. Clear the code and retest.

P0436

Catalyst Temperature Sensor Circuit Range/Performance Bank 2 Sensor 1

System: Auxiliary emission controls (P code)
Lamp: Check Engine Light
Category: Powertrain - Auxiliary Emissions Controls

What it means

P0436 means Catalyst Temperature Sensor Circuit Range/Performance Bank 2 Sensor 1.

Where it lives

For P0436, start at the sensor the description names. The description of P0436 puts it on bank 2.

Check these first

A catalyst temperature sensor on bank 2 sensor 1 reading implausibly
An erratic sensor signal
Corrosion at the sensor connector
A restricted bank 2 converter trapping heat
An ECM fault skewing the reading

What to do next

Compare the sensor reading to a cold start value
Inspect the sensor connector for corrosion
Check the bank 2 converter for a restriction
Verify the sensor is the correct part
Replace the sensor if the reading stays off
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.