P1525 Renault Megane 3 Jun 2026

P1525 – Air Conditioner Compressor Relay Circuit / Brake Pedal Position Sensor Correlation (Depending on ECU variant, most commonly refers to Throttle/Pedal position inconsistency or AC cut-off relay on Renaults).

On many Renault diesel engines (especially the 1.5 dCi K9K), P1525 often points to a brake pedal switch or throttle pedal sensor issue, not the AC compressor. It indicates a "plausibility" problem between the brake pedal signal and the accelerator pedal position. p1525 renault megane 3

If the above checks pass, a professional mechanic will use an oscilloscope to check the signals between the Engine and Gearbox ECUs. This determines if the wiring is physically capable of transmitting data. P1525 – Air Conditioner Compressor Relay Circuit /