P05E5

Symptoms

• Check Engine Light Is On
• The parking brake indicator does not light up even when the brake is on.
• Or the indicator is constantly on when the brake is released
• Failure of the starting assistant on a slope
• In EPB systems - loss of parking brake control

Causes

• Short circuit of the signal wire of the switch to the power wire (+12 V)
• Damage to the insulation of the wiring harness with contact between the signal and supply wires
• Internal fault of the switch with constant power supply to the signal output
• Corrosion of the connector with the formation of a parasitic path to the power supply
• Malfunction of the EPB control unit (in systems with electronic parking brake)

How to Fix

1. Read all fault codes; for EPB - use a specialized scanner that supports this system
2. Measure the voltage on the signal wire of the switch with the ignition on
3. Disconnect the switch connector: if the voltage drops to zero, there is a short circuit inside the switch; if it remains high, there is a short in the harness
4. Test the signal wire for a short with the power wire (+12 V)
5. Inspect the harness in the area of the parking brake lever and half the space under the console
6. Replace the switch or fix the short in the wiring

Related codes

Error P05E5 by Vehicle Brand