P0403 Exhaust gas recirculation control circuit
- System
- Powertrain - engine and transmission
What P0403 means
"Exhaust gas recirculation control circuit" names the circuit the computer uses to command that recirculation, rather than the flow that results from it. The name identifies the circuit and states no measurement and no direction, which is what separates it from P0401 and P0402 beside it.
This is a standard code. It means the same thing on every make of vehicle.
What the program shows for P0403
Commanded EGR is the Dashboard reading for what the computer is asking for, with EGR error beside it, and the Full scan's on-board self-tests carry the EGR and VVT results with the car's own limits. The Inspection screen reports whether the exhaust gas recirculation monitor has finished.
The Dashboard shows Commanded EGR, EGR error, Evap purge, Catalyst temp, O2 sensor (rear), Fuel level and Coolant temp. The Full scan's On-board self-tests list the Catalyst bank, EGR / VVT bank, EVAP leak, EVAP purge flow, EVAP purge valve and Secondary air results as PASS, FAIL or NO RESULT against the car's own limits, and the Inspection screen shows whether the Catalytic converter, Fuel vapour system, Exhaust gas recirculation and Secondary air injection monitors are done or still running. Clear codes warns that clearing resets those monitors.
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