Powertrain
generic / SAE
P2142
EGR Throttle Control Circuit A High
EGR throttle A drive line stuck high — short to B+. EGR mixes inert exhaust into intake to lower combustion peak temperature — too little raises NOx, too much causes misfires and rough running.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / 42
Possible causes
- Short to B+ high
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–900 €
- Estimated time: 0.7–3 h
- Component: egr throttle a
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012