Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. P2150 OBD-II Trouble Code: Fuel Injector Group B Supply Voltage Circuit Low

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

How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2422 OBD-II Trouble Code: Evaporative Emissions Control System (EVAP) Vent Valve Stuck Closed
Diagnostic Trouble Code (DTC): P2422 P2422 code definition Evaporative Emissions Control System (EVAP)...


Related questions

Q: How much should it cost to repair an airbag controller?

Hello - yes, by all means this should be repaired! Without it, your airbag is just dead weight in the vehicle, and offers no protection in the event of a crash. Was the vehicle in an accident which damaged the...

Q: I would like to collect brake pedal position information from my OBD2 port. Can this be done?

The brake pedal position does not have a specific wire to the OBD2 connector that can be monitored. You could however monitor the data stream and get the brake on or off PID in the data monitoring. The PID will...

Q: Check Engine Light was on with a gas smell. I took it to the dealer.

I would ask what codes they found and how they determined the fuel pump was the cause. They likely diagnosed the pump by measuring fuel pressure. You didn't say what kind of Hyundai you have, but generally, fuel pressure should...