Peugeot 308 (III) 1.2 PureTech: known faults of the engine according to L'argus

Engine / equipment

1.2 PureTech in the Peugeot 308 (III)

Period mentioned

2021–2026

Symptoms

Engine warning light on; Loss of power, pressure light and loss of brake assistance from premature timing belt wear (up to 20/06/2022); Oil consumption (up to 21/02/2023); Hard starting; Coolant leak from a porous cylinder head; Engine jerking and/or judder from carbon build-up, with a risk of engine damage; Hard starting, with black instrument cluster and centre screen (up to 01/03/2024); Coolant temperature, service and/or engine warning lights on (up to 17/03/2024); Loss of power (up to 01/07/2024)

Possible cause described

According to the brand's technical notes reported by L'argus (each date shows up to when the affected cars were built): 1) Engine warning light on: Engine speed sensor or ignition coils. 2) Loss of power, pressure light and loss of brake assistance from premature timing belt wear (up to 20/06/2022): New timing belt and, if needed, oil and vacuum pumps or the whole engine. Warranty extended to 10 years or 175,000 km. 3) Oil consumption (up to 21/02/2023): Oil vapour separator if it uses more than 0.3 l. Warranty extended to 10 years or 175,000 km. 4) Hard starting: Injectors, injection rail or high-pressure pump depending on diagnosis. 5) Coolant leak from a porous cylinder head: Cylinder head to be replaced. 6) Engine jerking and/or judder from carbon build-up, with a risk of engine damage: Cylinder head cleaning, spark plugs, intercooler, oil separator or even the engine depending on diagnosis. 7) Hard starting, with black instrument cluster and centre screen (up to 01/03/2024): Radio-frequency supervision unit to be replaced (recall MM4). 8) Coolant temperature, service and/or engine warning lights on (up to 17/03/2024): Cooling fan assembly to be replaced. 9) Loss of power (up to 01/07/2024): Heat exchanger (intercooler) air inlet union to be replaced.

Check for the garage

Compare your symptom and your car's build date with this list. If they match, tell the workshop and ask them to check that part first before replacing others. The brand or a warranty extension covers some repairs: ask the dealer with the car's details.

Cost cited in the source

No verified estimate; ask the garage for a quote.A rough figure from the original database, not an up-to-date quote.

Sources from the original database