1. Introduction
- Definition of P2150 code: Diagnostic Trouble Code (DTC) indicating a problem with the fuel injector group B supply voltage.
- Meaning of “lean condition”: Insufficient fuel in the combustion mixture, which can cause engine damage.
- Importance of engine maintenance: Need for diligence to keep the engine in good working condition.
2. Severity of DTC
- Severe: Risk of significant engine damage in the short and long term, especially at idle.
- Need for rigorous maintenance.
3. Symptoms
- Irregular engine performance.
- Misfires.
- Reduced fuel economy.
- Rough idle.
- Excessive smoke.
- Engine noise(s).
- Lack of power.
- Difficulty climbing steep hills.
- Reduced throttle response.
4. Common Causes
- Faulty or damaged fuel injector(s).
- Damaged wiring harness.
- Internal wiring malfunction.
- Internal ECM problem.
- Connector issue.
5. Troubleshooting Steps
- Basic Step #1:
- Locate the sensor “group” and the position of the injectors and their circuits.
- Inspect the wiring harness for frayed wires and repair damaged insulation.
- Basic Step #2:
- Check for connector corrosion due to moisture or fluids.
- Ensure connector tabs seal properly.
- Use an electrical contact cleaner.
- Basic Step #3:
- Check circuit integrity by following the maintenance manual steps.
- Continuity test:
- Disconnect the supply voltage circuit from the ECM and the injector.
- Use a multimeter to check circuit resistance.
- A high resistance value indicates a problem in the circuit.
- Trace the wire to locate the issue.