OBD-II code · Powertrain (generic, extended)
P240F EGR Slow Response
The EGR system reacts to commanded changes more slowly than calibrated - typically a partly clogged EGR cooler, sticky valve, or worn actuator.
Is it safe to drive with P240F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyEGR valve or cooler sticky
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
- 1–4 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Valve A, Egr Cooler A
Related codes
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.