P2143 — EGR vent control circuit has an electrical fault
The engine control unit detected a problem with the electrical circuit controlling the exhaust gas recirculation (EGR) vent. This usually means the wiring, connectors, or the EGR vent solenoid itself is malfunctioning or open, preventing proper EGR operation.
Common causes
The cause is almost always one of a few things. Here they are — P2143 rarely comes from anything outside this list:
- Damaged or corroded wiring/connectors in EGR vent circuit
- Faulty EGR vent solenoid or valve
- Blown fuse or relay related to EGR system
- ECU malfunction or poor ground connection
Where to start
In the order a sensible mechanic would work — the cheap checks first, the expensive replacements only after:
- Inspect and repair wiring and connectors first
- Check and replace blown fuses or relays
- Test and replace faulty EGR vent solenoid
- Clear codes and test drive to confirm repair
That is what holds for P2143 in general. From here it depends on your engine — tell me which car it is and what it does, and I will give you the steps for it: real procedures, torque figures and diagrams instead of general advice.
Why TorqFix for your car?
Above is what the code means and why it appears. TorqFix goes further — it gives you specific procedures, torque values, wiring diagrams and pinouts for your exact engine, not generic steps for every car. Real workshop data (127,000+ diagrams, 10,000+ procedures), interpreted by AI in your language.
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Code breakdown
🔧 Related repair procedures
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
The same code can mean different things on different makes. Match the meaning to your make before acting on it.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
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