OBD-II code · Powertrain (generic)
P045A EGR B Control Circuit
A general electrical fault on EGR control circuit B — second EGR valve on engines with high-pressure and low-pressure EGR loops.
Is it safe to drive with P045A?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySolenoid winding fault
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
- 0.7–3 h
- Emissions test
- Likely to fail
- Parts involved
- Egr Valve
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.