P2CE1Intake Air Heater C Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P2CE1 reports an interrupted circuit at intake air heater C, part of the grid-type pre-heat system a diesel uses to warm the incoming air for cold starts. Volvo and Mack use exactly this code on heavy trucks: their 2019 solution K53338075 for 11, 13 and 16 litre engines, including Mack MP7, MP8 and MP10, from US10+OBD13 onwards lists P2CE1-13, the suffix marking an open circuit, among the pre-heat relay codes. It warns that an ohmmeter check of the supply power cable may miss a damaged cable and asks to renew relay and cable together; a 2019 EMS software release also improved relay robustness for these codes. Heavy-duty OBD rules call for circuit continuity checks on intake air heaters. P0543 and P2605 are the open-circuit codes for heaters A and B.
- What you may notice
- Hard starting and long cranking in cold weather
- White smoke after a cold start
- Engine warning lamp
- Likely causes
- LikelyDamaged supply power cable between relay and heater, not always visible on an ohmmeter
- LikelyPre-heat relay contacts or output burnt open
- PossiblePoor terminal tension at the heating element or relay plug
- RareHeating element C itself burnt through
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.