P0436: Catalyst Temperature Sensor Circuit Range/Performance Bank 2 Sensor 1
What to do
Usually driveable. Expect comparison against the other temperature sensors rather than an immediate replacement.
What this code means
The bank 2 catalyst temperature sensor is reading within its electrical range but implausibly for the conditions — the counterpart of P0426. Comparing it against the coolant and intake temperature sensors on a cold engine identifies the odd one out.
Likely causes
Start here
- Faulty catalyst temperature sensor · moderate
- Sensor drifted out of calibration · moderate
Less common
- Corroded or loose connector · easy
Symptoms
Components involved
Information, not instruction
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Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
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What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
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