P02FB
Cold Start Fuel Injection Control Circuit/Open
The drive circuit for the cold-start auxiliary fuel injector or the cold-start ECU output is open. Some diesels use an extra cold-start injector to inject fuel into the intake manifold during very cold starts.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Injector winding openCommon
- Pin pushed back out of connector bodyLess likely
- Cracked solder joint inside the module or sensorLess likely
Parts involved
- Cold Start Injector
P02FB is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.