P0EC6A/C Power Supply Relay Control Circuit/Open
- Generic OBD-II code · Powertrain
- How the car detects it
- P0EC6 concerns the control side of the relay that switches power to air conditioning components, typically the compressor or climate electronics. The module driving the relay coil notices that its output does not behave as commanded, most often because the coil circuit is open. No manufacturer documents P0EC6 publicly, and the exact wiring differs by maker. CARB requires output components to be checked either functionally or for circuit continuity and shorts, and lets manufacturers report open and shorted states under one code, which is the role of this umbrella code. A relay that never pulls in leaves the A/C without power. Voltage-specific faults: P0EC7 and P0EC8; the clutch relay equivalent is P0645.
- What you may notice
- A/C or electric compressor completely without function
- No relay click when A/C is requested
- Likely causes
- LikelyRelay coil burnt open or relay missing
- PossibleOpen control wire or loose relay socket terminal
- RareFailed output driver in the controlling module
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.