P0EAF: A/C Compressor Motor Current Sensor Circuit Low

What it means

The ECM detects a circuit fault on the a/c compressor motor current sensor circuit. Reading cannot be used reliably for control.

At a glance

• Usually lights the check-engine light
• The engine or gearbox may go into limp mode

How it works

The A/C compressor motor current sensor measures electrical current used by the compressor, helping the control module manage and protect compressor operation. P0EAF indicates a general fault in the current sensor circuit, so the module cannot reliably use its reading; the code does not specify whether the signal is low, high, or out of range.

Common causes

Most likely first.

1. Sensor failed
2. Wiring or connector fault

Symptoms

• Check-engine or hybrid system warning light
• Air conditioning may not cool
• Cooling may be intermittent

How to diagnose it

1. Read freeze-frame data and related compressor or hybrid codes to see when the current sensor circuit fault was detected.
2. Inspect the current sensor connector and harness for loose connections, corrosion, damaged insulation, or heat exposure.
3. Check the sensor circuit's reference or supply, ground, and signal connections using the manufacturer's wiring information.
4. Test the current sensor wiring for opens, shorts, and poor connections with the system made safe according to manufacturer instructions.
5. If the wiring checks pass, compare current sensor operation with the manufacturer's specification to determine whether the sensor has failed.

Common fixes

• Reseat the current sensor connector and clean or repair corroded terminals.
• Repair damaged, open, or shorted current sensor wiring.
• Restore a poor ground or reference connection.
• Replace the compressor current sensor if it fails its specified checks.

Can I keep driving?

A/C cooling may be reduced or unavailable, and a hybrid warning may appear. Follow any stop-driving instruction from the vehicle; otherwise, avoid relying on cabin climate control and arrange diagnosis soon.