P2142EGR Throttle Control Circuit A High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2142 reports a high signal or overcurrent in the drive circuit of EGR throttle A. Either a motor lead has contact with battery voltage, or the motor draws more current than the output stage allows – from shorted turns or because carbon has jammed the blade. The driver then shuts down for protection, the flap springs back to its rest position and EGR regulation is lost. No manufacturer publishes thresholds for P2142; CARB obliges the system to recognise circuit faults of output components in both directions. P2141 is the low counterpart, P0487 the open circuit and P0488 the function check of the same flap; flap B reports a high circuit as P213D. If the cause is mechanical, cleaning or replacing the flap removes it, a wiring short needs a harness repair.
- What you may notice
- Check engine lamp on
- Reduced power or limp mode
- EGR readiness not completed
- Likely causes
- LikelyDrive wire shorted to battery voltage
- PossibleFlap jammed by carbon, motor overloaded
- PossibleShorted turns in the actuator motor
- RareFaulty output stage in the engine control module
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €600
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.