Known faults for the Peugeot 407.

Engine / equipment

PSA/Renault AL4 (DP0) four-speed automatic in Peugeot 206, 207, 307, 308, 406 and 407, Citroën C3, C4, C5, Xsara and Xsara Picasso, and DS3

Period mentioned

Approx. 2000–2015

Symptoms

The “Sport” and “Snow” lights flash together or “Gearbox fault” appears; very harsh shifts before the gearbox goes into limp mode in 3rd (only 3rd and reverse). It often happens when cold or after a few minutes' driving and clears after restarting the engine.

Possible cause described

The control unit sees a difference between calculated and actual pressure. The most cited cause is the pressure regulation solenoid (EPDE), though internal leaks or the pressure sensor are also possible. With badly degraded fluid, the fluid wear counter also triggers limp mode. Some owners replace the solenoid without fixing it.

Check for the garage

Read the codes with PSA-compatible equipment (Diagbox/Lexia) and log line pressure while driving, especially when cold. Check fluid level and condition and, if changed, use the specified fluid and reset the wear counter. Also check the lever position switch.

Cost cited in the source

No verifiable estimate in the sources; the solenoid is a replacement part and, according to a forum, it can be changed without removing the gearbox.A rough figure from the original database, not an up-to-date quote.

Sources from the original database

Engine / equipment

1.6 HDi DV6 (Peugeot 207/308/3008/Partner, Citroën C3/C4/Berlingo; same engine as the Ford 1.6 TDCi)

Period mentioned

Approx. 2004–2015

Symptoms

Loud turbo whistle, power loss, blue or black smoke, oil that gets dirty very quickly. Before the failure, often a puffing or ticking from the cylinder head and an exhaust smell from an injector.

Possible cause described

The injector clamp bolts work loose, the gas leak forms carbon that gets into the oil and clogs the mesh filter in the banjo bolt feeding the turbo. The turbo is starved of oil. Replacing only the turbo does not fix it.

Check for the garage

Check injector bolt torque and carbon at their base, the turbo banjo bolt and the sump strainer.

Cost cited in the source

Turbo + full oil system cleaning: approx. €900–2,000 (estimate)A rough figure from the original database, not an up-to-date quote.

Sources from the original database

Engine / equipment

PSA 2.0 HDi (DW10) and 2.2 HDi (DW12), including the 2.0/2.2 JTD in the Fiat Ulysse and Scudo and the Lancia Phedra

Period mentioned

1998–2015

Symptoms

Particulate filter warning and power loss; rough idle from a dirty EGR; vibration and knocks when starting or in low gears (dual-mass flywheel); smoke or hesitation from injectors at high mileage.

Possible cause described

The engine itself is very robust, but the ancillaries are not: the DPF with Eolys additive clogs in town use, the EGR and its cooler fill with soot, the variable-geometry turbo sticks and the dual-mass flywheel wears. The 136 hp versions have more problems than the 138 to 163 hp ones.

Check for the garage

Read the DPF status and additive level, check the EGR and cooler, check the dual-mass flywheel at start-up and measure injector balance rates.

Cost cited in the source

Forced DPF regeneration: €100–150; new DPF: €800–1,500; rebuilt injector: €200–250A rough figure from the original database, not an up-to-date quote.

Mileage cited in the database: 120,000–180,000 km. This is not a maintenance interval and does not predict a failure.

Sources from the original database