HVAC A/C Refrigerant Pressure Sensor Circuit
What does B1207 mean?
The B1207 code means the vehicle's onboard diagnostic system has detected: HVAC A/C Refrigerant Pressure Sensor Circuit. This is a moderate severity code.
Common Symptoms
- A/C not blowing cold air
- A/C compressor not engaging
- A/C works intermittently
- Engine cooling fan running abnormally
- Check engine light may also be on
Probable Causes (Ranked by Likelihood)
- Faulty A/C pressure sensor or transducer Very High
- Low refrigerant level High
- Corroded pressure sensor connector Moderate
- Damaged wiring to pressure sensor Moderate
- A/C system overcharged Low
Step-by-Step Diagnostic Procedure
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Read DTCs from HVAC and PCM modules
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Check A/C pressure sensor readings with scan tool
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Measure actual refrigerant pressure with manifold gauges
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Inspect pressure sensor connector for corrosion
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Compare scan tool pressure reading to gauge reading
Frequently Asked Questions
Can low refrigerant cause this code?
Yes. If refrigerant is low, the pressure sensor reads abnormally low pressures. The system may set this code if the reading is outside the expected range.
Where is the A/C pressure sensor?
The A/C pressure sensor is typically located on the high-pressure refrigerant line, near the condenser or the compressor, accessible from the engine bay.
Can I recharge the A/C myself?
DIY A/C recharge kits are available, but if the system is low on refrigerant, there is likely a leak that should be found and repaired to prevent recurring issues.