A/C Refrigerant Pressure Sensor B Circuit High
The P2517 code means the vehicle's onboard diagnostic system has detected: A/C Refrigerant Pressure Sensor B Circuit High. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $450 (parts and labor)
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Common Symptoms
- A/C compressor disabled by ECM
- No A/C cooling output
- Check engine light on
- A/C clutch not engaging
Probable Causes (Ranked by Likelihood)
- Faulty pressure sensor reading high Very High
- Short to voltage in sensor signal wire High
- Overcharged A/C system Moderate
- Blocked A/C condenser restricting airflow Low
Step-by-Step Diagnostic Procedure
-
Compare pressure sensor reading to manifold gauge pressure
-
Check sensor signal wire for short to battery voltage
-
Verify A/C system refrigerant charge amount
-
Inspect A/C condenser for blockage or debris
Frequently Asked Questions
Why did the ECM disable my A/C compressor?
P2517 indicates the pressure sensor reports excessively high pressure. The ECM disables the compressor to prevent system damage from over-pressure conditions.
Can an overcharged A/C system cause P2517?
Yes. Too much refrigerant causes dangerously high pressures. However, a faulty sensor is more common. Verify actual pressure with manifold gauges.
Is it harmful to drive without A/C?
No, the vehicle drives normally. The A/C compressor is simply disabled as a protective measure. Fix the sensor to restore A/C operation.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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