OBD-II code · Powertrain (generic, extended)
P2CD4 A/C Refrigerant Pressure Sensor A/B Correlation
The signals of A/C refrigerant pressure sensors A and B do not correlate within the calibrated tolerance. One sensor drifts or installation offset between the two channels.
Is it safe to drive with P2CD4?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOne sensor characteristic drifted
- PossibleHarness incorrectly swapped between channels
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.3–2 h
- Emissions test
- Usually unaffected
- Parts involved
- AC Refrigerant Pressure Sensor A, AC Refrigerant Pressure Sensor B, Ecm
Related codes
- P2CD1Hybrid/EV Battery Pack L Deterioration
- P2CD2Hybrid/EV Battery Pack M Deterioration
- P2CD3Hybrid/EV Battery Pack N Deterioration
- P2CD5Turbocharger/Supercharger Bypass Valve C Stuck
- P2CD6Turbocharger/Supercharger Boost Sensor D Circuit
- P2CD7Turbocharger/Supercharger Boost Sensor D Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.