Error code
OBD2 P2043
OBD2P2043
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Reductant Temperature Sensor Circuit Range/Performance.
Severity
moderateCan drive but may fail emissions tests.
Summary
P2043 indicates an issue with the reductant temperature sensor circuit, which is part of the emissions system.
Common Causes
- Wiring issues
- Faulty reductant temperature sensor
Fixes
- Replace the faulty reductant temperature sensor.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
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