OBD-II code · Powertrain (generic, extended)
P2561 A/C Control Module Requested MIL Illumination
The A/C / HVAC control module has requested the ECM to illuminate the malfunction indicator (MIL) because of an emissions-relevant fault on its side. The original fault is stored in the HVAC module — this code only signals that the ECM has honoured the request.
Is it safe to drive with P2561?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyInternal fault in the HVAC module — read its DTCs
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 0.3–3 h
- Emissions test
- Likely to fail
- Parts involved
- HVAC Module
Related codes
- P255EPTO Speed Selector Sensor/Switch 2 Circuit Intermittent/Erratic
- P255FA/C Request A Circuit Range/Performance
- P2560Engine Coolant Level Low
- P2562Turbocharger Boost Control Position Sensor A Circuit
- P2563Turbocharger Boost Control Position Sensor Circuit
- P2564Turbocharger Boost Control Position Sensor A Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.