P0612
P0612 on Opel — Rough running, poor performance and intermittent failures to start with the fault warning light on
Code P0612 indicates that the section of the engine control unit driving the injectors is not working as expected. On the Opel Grandland X 1.2 Turbo with the VD56.1 control unit it shows up as hard starting, a rough idle and reduced performance.
- System
- Fuel injection
- Component
- Engine control unit
- Fault
- The vehicle is very hard to start, idles roughly and performs poorly on the road, with the engine warning light on.
- Typical symptoms
-
- Hard starting, with possible failures to start
- The engine idles roughly
- Reduced performance on the road
- Engine warning light on the instrument cluster
- Vehicles affected
-
- Opel Grandland X 1.2 Turbo 12v with VD56.1 engine control unit
- Main code
-
- P0612 Fuel injector control unit drive circuit performance
- Related codes
-
- P1632 Internal fault in the engine management control unit
- P0002 Fuel volume regulator performance
- P0171 Mixture control, mixture too lean - inconsistent signal
On this fault the diagnostic tool often returns several codes together.
- Solution
-
See the repair procedure verified on Sema Repair.
The cause and the repair are on Sema Repair
On Sema Repair this code is linked to verified case studies, with the confirmed cause case by case, the job step by step, indicative times, the manufacturer's notes and a photograph of the component with the point of intervention highlighted.