OBD-II code · Powertrain (generic, extended)
P240E Alternative Fuel High Pressure System Leak
Alternative Fuel High Pressure System Leak: a leak has been detected in this brake-hydraulic circuit, which reduces braking pressure. Safety-critical.
Is it safe to drive with P240E?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyHose, fitting or cylinder valve leak
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Likely to fail
- Parts involved
- Alternative Fuel High Pressure Line
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.