Powertrain
generic / SAE
P04FA
EGR A Control Temperature Too High
The ECU monitors the operating temperature of the EGR A actuator (or its control electronics). The reading has exceeded the safe upper threshold and the control unit derates or disables EGR A to protect the actuator from thermal damage.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / FA
Possible causes
- Actuator overheated due to nearby exhaust heat or duty-cycle stress high
- Cooling jacket or air flow insufficient 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: medium
- DIY: shop recommended
- Estimated cost: 250–1200 €
- Estimated time: 1.5–4 h
- Component: egr actuator a
- Component: egr cooling
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012