P05E2

Symptoms

• Check Engine Light Is On
• Unstable air conditioner efficiency
• Spontaneous shutdown of the air conditioner in emergency mode
• Cooling fans run at maximum speed for no apparent reason
• Increased fuel consumption due to incorrect compressor control

Causes

• Poor contact in refrigerant pressure sensor connector B
• Damage to the wiring harness in the area of vibrating units
• Corrosion of sensor connector contacts from exposure to moisture and reagents
• Unstable reference voltage common to sensors A and B
• Incipient failure of pressure sensor B itself

How to Fix

1. Read fault codes; if both P05E1 and P05E2 are active, check the general power supply to the pressure sensors
2. Check sensor B data in real time while the air conditioner is running
3. Inspect sensor connector B: move the harness, observing signal changes
4. Measure the stability of the 5 V reference voltage and the quality of the ground in the sensor B circuit
5. Check the condition of the harness in the compressor and condenser area
6. Replace the refrigerant pressure sensor B if it is confirmed to be faulty

Related codes

Error P05E2 by Vehicle Brand