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TuningBot DTC Database · v4.37.15

P202C Reductant tank heater control - circuit high

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

P · PowertrainEmissionsOBD2

What P202C means

P202C
Reductant tank heater control - circuit high Generic · emissions Data confidence 85%

The control module detected that the signal in the Reductant tank heater control circuit stayed above the expected operating range.

Symptoms

  • MIL or SCR/AdBlue warning illuminated
  • Possible start-count-down or torque limitation on some applications

Possible causes

  • Wiring
  • reductant tank heater
  • ECM

Recommended checks

  • Read NOx sensor values and dosing system status
  • Check reductant level and quality data
  • Inspect dosing valve, lines and heater operation
  • Check wiring and connectors of the SCR components
  • Check for OEM technical bulletins and software updates

Related and nearby codes

How to read P202C

P

Powertrain: engine, transmission and driveline systems.

2

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

02C

Specific fault index within the subsystem.

Frequently asked questions about P202C

What does P202C mean?

Reductant tank heater control - circuit high. The control module detected that the signal in the Reductant tank heater control circuit stayed above the expected operating range.

Is P202C generic or manufacturer-specific?

P202C is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove P202C at file level?

If the fault logic lives in the ECU calibration, yes: our DTC Removal file service disables the specific fault entry. Checksum correction is not included: it is a separate, optional service. 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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