Powertrain
generic / SAE
P2AA6
EGR Cooler Bypass Control Circuit Driver Current/Temperature Too High Bank 2
The output driver for the EGR cooler bypass actuator on bank 2 reports current or junction temperature above its protection threshold. Stalled actuator or short to ground.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberA / A6
Possible causes
- Bypass actuator mechanically jammed high
- Control wire shorted to ground medium
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–1800 €
- Estimated time: 2–6 h
- Component: egr cooler bypass actuator b2
- Component: ecm
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012