Powertrain
generic / SAE
P0405
Exhaust Gas Recirculation Sensor "A" Circuit Low
Exhaust Gas Recirculation Sensor "A" Circuit Low: the signal voltage is below the expected range. Without valid EGR feedback the ECU disables exhaust gas recirculation and may set further EGR codes.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / 05
Possible causes
- EGR position sensor failed high
- Wiring or connector fault medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: medium
- DIY: possible
Pro mode: costs, time and components
Free with the newsletter by Fabian Brose: enter your name and email, confirm by mail – Pro mode is then unlocked on this device for 30 days. The newsletter arrives about every two weeks, unsubscribe at any time. Already subscribed? One click is enough – you will be recognised.
Unlock Pro mode for freeSources
References
sae:J2012