OBD-II code · Powertrain (generic, extended)
P2BAE NOx Exceedence - EGR System
NOx emissions are above the legal threshold and the ECU isolates the cause to the EGR system. EGR flow is too low or absent under operating conditions where NOx reduction is required.
Is it safe to drive with P2BAE?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyEGR valve stuck closed
- Most likelyCarbon clogged EGR passages
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Egr Valve, Egr Cooler, Egr Diff Pressure Sensor
Related codes
- P2BABNOx Exceedence — Reagent System Performance
- P2BACNOx Exceedence - Insufficient Reagent Quality
- P2BADNOx Exceedence - Insufficient Reagent Consumption
- P2BAFNOx Sensor Heater Sense Circuit Range/Performance Bank 1 Sensor 1
- P2BB0Alternative Fuel Consumption Too Low
- P2BB1Alternative Fuel Consumption Too High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.