A/C Compressor Motor Speed Sensor Range/Performance

Where it lives

For P0EC5, the part to look at first is the sensor named here.

Check these first

• A compressor motor speed sensor giving an out of range signal
• A failing compressor motor speed sensor
• Debris or a damaged tone ring at the speed sensor
• High resistance in the speed sensor wiring

What to do next

1. Read A/C compressor motor speed on a scan tool
2. Compare the speed reading to the commanded speed
3. Inspect the speed sensor and tone ring for damage
4. Test the speed sensor wiring for added resistance
5. Replace the speed sensor if the signal is erratic
6. Clear the code and retest

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