P2151: Fuel Injector Group B Supply Voltage Circuit High
Do not keep driving
Expect a misfire on part of the engine. Ask for the injector windings in the group to be measured before the supply is investigated further.
What this code means
The group B injector supply reads high, or cannot be pulled down as expected. An injector that has gone open-circuit removes its load from the group and can produce this without anything being wrong with the supply.
Likely causes
Start here
- Open circuit in injector wiring · moderate
- Failed fuel injector · moderate
- Corroded or loose connector · easy
Less common
- Faulty fuel injector control module · specialist
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 P2151.