P0405
Exhaust Gas Recirculation Sensor A Circuit Low
Generic code
Auxiliary Emissions Control
Medium severity
Moderate repair
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What P0405 means
- The fault code P0405 signifies that there is an issue with the circuit A of the Exhaust Gas Recirculation (EGR) Sensor. This fault code may affect the vehicle's performance, and it may not meet the emission standards.
Possible symptoms
- Check Engine Light is illuminated
- Rough idle or stalling
- Poor acceleration and engine performance
- Failed emissions test
Possible causes
- Wire of the circuit A of EGR sensor is broken or shorted to ground
- Failed EGR sensor
- Malfunctioning Engine Control Module (ECM)
- Corroded or poor electrical connections in the circuit
- Failed EGR valve
Related parts
- Exhaust Gas Recirculation (EGR) Sensor: Exhaust gas recirculation (EGR) is an emissions reduction technique used in petrol and diesel engines. Problems lead to harmful emissions out of limit
Possible solutions
- Inspect and replace the circuit A wire of the EGR sensor
- Replace the EGR sensor
- Repair or replace the Engine Control Module (ECM)
- Check and clean electrical connections in the circuit
- Replace the EGR valve if necessary
Free on OBD DashX
P0405 on OBD DashX
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