Skip the auto shop - Our mechanics make house calls

P2150 OBD-II Trouble Code: Fuel Injector Group B Supply Voltage Circuit Low

diagnostic check engine light

P2150 code definition

The P2150 code is a generic powertrain code related to fuel or air meter injection system issues, including a fuel injector problem. In this case, the engine control module (ECM) has received a signal from the fuel injector group B circuit that is lower than preset threshold parameters.

Codes related to the P2150 include:

What the P2150 code means

A P2150 code is stored when the ECM is sent a voltage reading for a set of fuel injectors that is outside of preset parameters. In this case, the ECM has detected an issue with Group B, which is typically engine Bank 2, containing Cylinder 2.

Typically, voltage signals will need to be at least 10% lower than preset parameters. Check your vehicle’s service manual for specifics for your vehicle’s make and model.

What causes the P2150 code?

Several problems may cause a P2150 code including:

  • Damaged wiring
  • Corroded or faulty wiring or connectors
  • Damaged or defective fuel injector driver
  • Damaged, faulty, or blown fuse(s)
  • Damaged or defective ECM (rare)

What are the symptoms of the P2150 code?

Symptoms of a P2150 code may include:

  • Check engine or warning light may illuminate
  • Engine may idle roughly or shudder
  • Vehicle may start up slowly when the engine is cold
  • There may be an excess of smoke at vehicle start up
  • The engine may misfire
  • Vehicle may hesitate during acceleration

How does a mechanic diagnose the P2150 code?

A mechanic may use several methods to diagnose a P2150 trouble code, including:

  • Utilize an OBD-II scanner to check for a stored P2150 trouble code
  • Utilize a digital volt/ohmmeter to test for a constant power supply to the Fuel Injector Group B
  • Check system fuses and relays for possible damage
  • Test for continuity and resistance for circuits related to Fuel Injector Group B
  • Remove Fuel Injector and observe fuel spray pattern for abnormalities

Common mistakes when diagnosing the P2150 code

At times, the ECM is replaced when the actual problem is damaged circuitry in the fuel injection system. It is recommended to fully diagnose all possible causes for the P2150 code before replacing the ECM.

How serious is the P2150 code?

Because a vehicle’s safe driving operation most likely will be impacted due to faults that store a P2150 code, in addition to the possibility of excess vehicle emissions, this code is considered a potentially serious code. When this code appears, it is recommended to immediately take your vehicle to your local service center or mechanic for repair and diagnosis.

What repairs can fix the P2150 code?

Several repairs can fix a P2150 trouble code and include:

Additional comments for consideration regarding the P2150 code

Typically, additional engine misfire codes will accompany a P2150 trouble code. It is recommended to diagnose and repair codes in the order in which they appear, as subsequent codes may be a symptom of a larger problem.

In addition, a common cause for this problem is due to animals seeking shelter in the engine compartment, who then gnaw on and damage wiring.

Need help with a P2150 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Symptoms of a Bad or Failing Flexible Clutch Hose
Common signs include difficulty shifting, low clutch fluid, and feeling no resistance at the clutch pedal.
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
P0222 OBD-II Trouble Code: Throttle/Pedal Position Switch/Sensor B Circuit Low Input
P0222 code definition Throttle/Pedal Position Switch/Sensor B Circuit Low Input What the P0222 code means The manufacturer specifies a range of acceptable voltage to be produced from the throttle position...


Related questions

Q: Vehicle shuts off intermittently at idle

The P0113 code relates to a problem with the intake air temperature (IAT) sensor. The computer is seeing a reading that is outside of its normal parameters and is causing the computer to set the code. This could also be...

Q: Where is the plug in for the code reader? 2013 Honda Civic

I am working on this

Q: Check Engine Light on Dodge Ram 1500 with code P0073

Check the condition of the harness that plugs into the sensor to ensure that the sensor is staying plugged in. If you are saying that the sensor is functioning and the voltage does change, then it is possible that your...