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TuningBot DTC Database · v4.37.14

P0437 Catalyst Temperature Sensor Low Input (Bank 2 Sensor 1)

Generic (OBD-II) interpretation in the TuningBot DTC database.

P · PowertrainEmissionsOBD2

What P0437 means

P0437
Catalyst Temperature Sensor Low Input (Bank 2 Sensor 1) Generic · emissions Data confidence 90%

The control module detected that the Catalyst Temperature signal stayed below the expected range.

Symptoms

  • MIL illuminated
  • Possible smell of unburnt fuel or reduced performance in severe cases

Possible causes

  • Wiring short to earth
  • catalytic converter temperature sensor
  • ECM

Recommended checks

  • Compare upstream and downstream oxygen sensor signals
  • Check for exhaust leaks
  • Check for stored misfire or mixture codes first
  • Verify catalyst temperature plausibility where available

Related and nearby codes

How to read P0437

P

Powertrain: engine, transmission and driveline systems.

0

Generic SAE-standard code: same meaning on every make.

437

Specific fault index within the subsystem.

Frequently asked questions about P0437

What does P0437 mean?

Catalyst Temperature Sensor Low Input (Bank 2 Sensor 1). The control module detected that the Catalyst Temperature signal stayed below the expected range.

Is P0437 generic or manufacturer-specific?

P0437 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P0437 at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry and, where the ECU needs it, corrects the checksum too. Not sure whether your case qualifies? Request a free assessment and our engineers will check your ECU file.

Other file services

ECU tuningDyno-tested results by model and engine See the results →

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