Audi
Diesel pre-injection switched off. Rough running; check for petrol or water in the diesel.
P1175 fault code: what it means
P1175: Diesel pre-injection switched off. Rough running; check for petrol or water in the diesel.
Usual causes, most likely first
- petrol or biodiesel in the tank
- water in the fuel
- low fuel pressure
- injection pump fault
P1175 by make
Land Rover
Right bank mixture adaptation over time too small (rich).
Skoda
Diesel pre-injection switched off. Rough running; check for petrol or water in the diesel.
Volkswagen
Diesel pre-injection switched off. Rough running; check for petrol or water in the diesel.
What the repair usually costs
- Air-fuel ratio / front O2 sensor replace (upstream)NZ$270–NZ$750 · A$260–A$730
- O2 sensor replace (downstream / after cat)NZ$180–NZ$480 · A$180–A$460
- High-pressure fuel pump (GDI petrol or common-rail diesel)NZ$1,140–NZ$4,280 · A$1,060–A$3,800
Not sure what P1175 means on your car? Ask Credov.
Before you clear it
Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.
Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.