Powertrain: engine, transmission and driveline systems.
2
Generic SAE-standard code: same meaning on every make.
042
Specific fault index within the subsystem.
Frequently asked questions about P2042
What does P2042 mean?
Reductant Temperature Sensor A Circuit. The control module detected improper operation of the Reductant Temperature Sensor A circuit.
Is P2042 generic or manufacturer-specific?
P2042 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.
Can TuningBot remove P2042 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.
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