Powertrain
generic / SAE
P21D1
Cylinder 3 Injector B Circuit/Open
The drive circuit of cylinder 3 second injector (B) is open. Modern direct-injection systems sometimes use a port-injection backup; injector B refers to that secondary set.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / D1
Possible causes
- Injector winding open high
- Pin pushed back out of connector body low
- Cracked solder joint inside the module or sensor low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–1500 €
- Estimated time: 1–4 h
- Component: fuel injector
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012