P2151 Fault Code

Fuel Injector Group B Supply Voltage Circuit High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2151 fault code indicates an issue with the fuel injector group B supply voltage circuit being too high. This can lead to irregular fuel injection patterns and affect the overall performance of the engine. Understanding this code is essential for troubleshooting related fuel delivery problems.

What are the symptoms of the P2151 code?

• Engine misfires.
• Poor acceleration or sluggish performance.
• Check Engine Light illuminated on the dashboard.
• Increased fuel consumption.
• Rough idle or stalling.

What causes the P2151 code?

• Faulty fuel injectors in group B.
• Short circuit in the wiring harness.
• Poor electrical connections.
• Issues with the engine control module (ECM) or powertrain control module (PCM).
• Failed voltage regulator causing excessive voltage in the circuit.

How to fix P2151?

• Inspect the wiring and connectors related to fuel injectors in group B for signs of damage or wear.
• Test the voltage levels at the fuel injectors to ensure they are within specified limits.
• Replace faulty injectors if they are found to be malfunctioning.
• Check the ECM or PCM for any coding issues and update or replace if necessary.
• Repair any shorts or grounding issues found in the circuit.