Generic (OBD-II) interpretation in the TuningBot DTC database.
P · PowertrainEmissionsOBD2
What P202A means
P202A
Reductant tank heater control - open circuit
Generic · emissions
Data confidence85%
The control module detected an interruption (open circuit) in the Reductant tank heater control circuit, so the expected electrical continuity was not present.
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
Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
02A
Specific fault index within the subsystem.
Frequently asked questions about P202A
What does P202A mean?
Reductant tank heater control - open circuit. The control module detected an interruption (open circuit) in the Reductant tank heater control circuit, so the expected electrical continuity was not present.
Is P202A generic or manufacturer-specific?
P202A is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P202A 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.
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