Refrigerant Pressure Sensor Failure
The refrigerant pressure sensor is reporting an implausible pressure value.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The refrigerant pressure sensor is broken or sending incorrect pressure readings to the engine control module (ECM).
What the computer is actually seeing
The ECM sees a refrigerant pressure value that is outside the normal operating range, which should be between 25 to 45 psi during engine operation.
What a healthy reading looks like
Refrigerant pressures should range from 25 to 45 psi under normal conditions; sensor readings above 60 psi or below 20 psi may trigger this code.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the refrigerant pressure sensor wiring and connectors for damage or corrosion. If damaged, repair and retest. Decision point: are there any visible issues? Yes - fix, No - go to step 2.
- 22. Check the refrigerant level in the system; it should be at proper levels according to the manufacturer's specification. Decision point: is the refrigerant level adequate? Yes - continue, No - recharge and retest.
- 33. With the engine running, measure the pressure at the refrigerant system using a manifold gauge set. Compare it to expected values. Decision point: are the pressures within expected range? Yes - sensor may be faulty, No - check for system blockages or leaks.
Common causes
- Faulty refrigerant pressure sensor
- Damaged wiring or connectors leading to the sensor
- Low refrigerant level
- Clogged expansion valve or receiver dryer
- Incorrect refrigerant type
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive, but fix it soon to avoid AC issues.
Will this code come back after reset?
If the underlying issue isn't fixed, yes, it will likely return.
Why does this code appear with other refrigerant codes?
It's common for multiple codes to trigger when there’s a general issue with the refrigerant system.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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