Peugeot 308 Mk1 1.6 HDi 112bhp — EGR Valve Failure
EGR failure on the 308 HDi causes the familiar symptoms of power loss and rough running. The PSA 1.6 HDi EGR system is well-known for carbon build-up.
Severity
ModerateDIY Difficulty
Moderate
Est. Cost
£100–£450
OBD Codes
P0400P0401EGR
Typical layout and location for the EGR assembly.
Symptoms
- EML and power loss
- Rough idle
- Black smoke
- P0400/P0401 codes
Root Cause
Carbon deposits from exhaust gas recirculation accumulate on the EGR valve. More severe in urban use.
How To Fix
- Remove and clean EGR valve thoroughly
- Clean intake manifold
- Replacement if valve is stuck: £120-280
- Fitted: £250-450
Estimated Repair Costs
| Repair Option | Est. Cost (GBP) |
|---|---|
| DIY (parts only) | £40–£180 |
| Independent Garage | £100–£450 |
| Main Dealership | £160–£720 |
Other Faults on This Variant
Timing Belt Failure (60,000-Mile Interval)
CriticalThe 308 Mk1 1.6 HDi carries the same strict 60,000-mile belt interval as the 207. Many 308 owners are misled by the larger car into assuming a longer belt life.
DPF Blockage
ModerateDPF blockage on the 308 HDi is a common complaint. Used as a family hatchback on short local journeys, many 308 diesels never get the sustained high-speed running needed for regeneration.
Disclaimer: Repair cost estimates are indicative and based on community data. Always get a quote from a qualified mechanic before proceeding with any repair.