P2150: Fuel Injector Group B Supply Voltage Circuit Low
Do not keep driving
Expect a severe misfire. Ask for each injector in the group to be measured — one shorted injector looks exactly like a supply fault.
What this code means
The group B injector supply reads low. As with group A, an internally shorted injector loading the shared rail is the leading cause and is found by measuring each winding in the group individually.
Likely causes
Start here
- Short circuit in a fuel injector · moderate
- Wiring shorted to ground · moderate
- Faulty fuel injector control module · specialist
Less common
- Damaged injector wiring harness · moderate
Symptoms
Components involved
Information, not instruction
CarGeek is a reference, not a service manual. Its pages are written from public sources and from what other people have found, never from a manufacturer's own service information, so they can be wrong or incomplete for your particular vehicle. Some of what they describe carries real risk: high voltage, fuel under pressure, stored energy, hot and moving parts.
Have anything you intend to act on checked by a trained person against the manufacturer's own procedure for your vehicle. Nothing here replaces that procedure.
Community experience
Be the first to write this up
Nothing posted about this yet. Whatever you found is worth writing down — even a dead end saves someone the same afternoon.
What makes one worth reading:
- The car — make, model, year and engine. The same fault behaves differently on each.
- What you measured, not only what you replaced.
- What actually fixed it — or that nothing did, which is worth knowing too.
Sign in or create an account to add what you found about P2150.