Error code

OBD2 P0487

OBD2P0487
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Exhaust Gas Recirculation Throttle Position Control Circuit.

Severity

moderateCan drive, but performance issues may arise if not addressed.

Summary

P0487 indicates an issue with the exhaust gas recirculation (EGR) throttle position control circuit in your vehicle's engine control unit (ECU). This can involve problems with wiring, connections, or the ECU itself.

Symptoms

  • No symptoms initially; service engine light may come on after several starts. In severe cases, performance issues like knocking and rough idling might occur.

Common Causes

  • Faulty EGR valve
  • Clogged or blocked EGR passages and sensors
  • Faulty wiring harness or connectors
  • Corroded or damaged electrical components

Diagnosis

  1. Inspect vacuum hoses and wires for damage.
  2. Check EGR valve operation with a hand-held vacuum pump.
  3. Test the EGR solenoid for proper function.
  4. Examine throttle position control circuit wiring and connectors.

Fixes

  • Replace faulty components such as the EGR valve, sensors, or wiring harness.

FAQ

What should I do if my car has P0487?

Start by inspecting vacuum hoses and electrical connections. If issues persist, consult a professional mechanic to diagnose further.

Is the EGR valve always the problem with P0487?

No, while the EGR valve can be faulty, other components like sensors or wiring are often the cause.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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