OBD-II code · Powertrain (generic)
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.
Is it safe to drive with P04FA?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyActuator overheated due to nearby exhaust heat or duty-cycle stress
- PossibleCooling jacket or air flow insufficient
Symptoms
- Check engine light on
- Pinging or knocking under load
- Power loss and hesitation
- Possible rough idle
- Failed emissions inspection (NOx)
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–4 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Actuator A, Egr Cooling
Related codes
- P04F7Catalyst Heater Circuit High Bank 2
- P04F8Catalyst Heater Circuit Intermittent Bank 1
- P04F9Catalyst Heater Circuit Intermittent Bank 2
- P04FBCrankcase Ventilation Hose Connection Sensor Range or Performance
- P04FCCrankcase Ventilation System Performance
- P04FDEGR Actuator A Control Processor Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.