P2143
EGR Vent Control Circuit/Open
EGR / emissions
Generic OBD-II
Low
What it means
P2143 means the ECM detected an open in the control circuit for the EGR vent solenoid, which manages vacuum to the EGR valve. It's an emissions fault that rarely affects daily driving, though it can cause pinging under load and will keep the car from passing an emissions test. The usual causes are the solenoid itself or its wiring.
Low
Can I keep driving? Safe to drive — it's an emissions fault; you may notice mild pinging under load, and it will block an emissions pass.
Common symptoms
What you'll notice
- Check-engine light on
- Often no noticeable driving symptoms
- Possible pinging or knock under load or at higher speeds
- Fails an emissions/readiness test
Common causes
Most likely first
- Faulty EGR vent control solenoidLikely
- Open or shorted wiring in the vent control circuitCommon
- Poor connection or corrosion at the solenoid connectorCommon
- Carbon buildup restricting the EGR valve or passagesLess often
- Rarely, a faulty ECM/PCM driverLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and scan for other EGR codes to narrow it down.
- Inspect the EGR vent solenoid connector and wiring for opens, shorts, and corrosion.
- Check the solenoid's resistance against spec and confirm it gets power and a control signal.
- Clean the EGR valve, tube, and passages before condemning parts.
- If the circuit checks out but the solenoid is out of spec, replace it and retest.
FAQ
Quick answers
Is it safe to drive with P2143?+
Yes, in the short term. It's an emissions fault, but persistent knock under load can stress the engine, so don't leave it indefinitely.
Can I just clear P2143?+
It returns until the vent control circuit or solenoid is repaired.
Related codes
Often seen with P2143
Read & clear P2143 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX