P2150

Fuel Injector Group B Supply Voltage Circuit Low

Q: Is it safe to drive with P2150?

Only cautiously. If a group of injectors is losing power the affected cylinders can misfire or cut out, which risks a stall — get it diagnosed soon.

Q: Can I just clear P2150?

It returns while the supply circuit is faulty, and the running problems come back with it. The wiring or control module has to be repaired.

Injector circuit Generic OBD-II Medium

What it means

P2150 means the ECM detected low voltage on the supply circuit that powers fuel injector group 'B'. Injectors need full battery voltage to open properly; when the feed drops, that group of cylinders can misfire, run rough, or lose fuel — so it's worth tracing the wiring and connections promptly.

Medium

Can I keep driving? Low power to a bank of injectors can cause misfires, rough running, or a stall, so treat it as drive-with-caution and get it looked at soon.

Real-world scan data

Seen in

120

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P2150 scans

P2151in 62.5% of scans

P0562in 61.7% of scans

P0380in 55.8% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Rough running or misfire (may affect one bank of cylinders)
Hesitation or loss of power
Possible hard starting or stalling

Common causes

Most likely first

Poor connection or corrosion in the injector group B power-supply circuitLikely
Open or shorted wiring in the group B supply harnessCommon
Blown fuse or relay feeding the injector group (where fitted)Common
Faulty fuel injector control module / injector driverLess often

How to diagnose & fix

Work through it in order

Visually inspect the group B injector wiring, connectors, and any related fuse/relay for damage or corrosion.
Check the supply voltage feeding the injector group with the key on.
Test the injector control module grounds against battery ground.
Repair any open/shorted wiring or poor connections found.
If supply and wiring are good, have the injector control module evaluated.

FAQ

Quick answers

Is it safe to drive with P2150?+

Only cautiously. If a group of injectors is losing power the affected cylinders can misfire or cut out, which risks a stall — get it diagnosed soon.

Can I just clear P2150?+

It returns while the supply circuit is faulty, and the running problems come back with it. The wiring or control module has to be repaired.

Read & clear P2150 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX