The P2155: Fuel Injector Group ‘D’ Supply Voltage Circuit/Open indicates that there is an open circuit or loss of voltage in the fuel injector group ‘D’ supply circuit. This can be caused by faulty wiring, a malfunctioning injector, or issues with the power supply to the injectors, which may affect engine performance.
P2155 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2155: Fuel Injector Group ‘D’ Supply Voltage Circuit/Open |
| Is it serious? | Yes, it can lead to engine misfires, poor performance, or failure to start due to improper fuel injection. |
| Possible causes | – Open circuit in the fuel injector group ‘D’ supply voltage – Faulty fuel injector group ‘D’ or wiring – Issues with the power supply |
| How to diagnose? | – Inspect wiring and connectors for the fuel injector group ‘D’ supply – Test the fuel injector group ‘D’ for faults – Check the power supply to the injectors |
P2155 Meaning
The P2155 code signals that the voltage supply to fuel injector group ‘D’ has been disrupted due to an open circuit. This open circuit prevents the injectors from receiving the necessary voltage to deliver fuel properly to the engine, causing engine misfires or poor performance.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for other fault codes related to the fuel system or injectors that could provide more information on the issue. | OBD-II Scanner |
| Inspect Wiring and Connectors | Visually inspect the wiring and connectors for fuel injector group ‘D’ for signs of damage, loose connections, or corrosion. Repair or replace as needed. | Flashlight, Multimeter |
| Measure Voltage at Injectors | Use a multimeter to measure the voltage at the fuel injectors in group ‘D’. Compare the readings with manufacturer specifications to ensure that proper voltage is being supplied. | Multimeter |
| Test the Fuel Injectors | Use a diagnostic tool to test the fuel injectors in group ‘D’. Replace any faulty injectors that are not performing within the correct specifications. | Diagnostic Tool, Multimeter |
| Check Power Supply Components | Inspect the power supply components (such as fuses, relays, and the ECU) that control fuel injector group ‘D’. Ensure that they are functioning properly and delivering the necessary voltage. | Multimeter, Wiring Diagram |
| Check for Open Circuits | Use a multimeter to perform continuity tests on the wiring to check for open circuits that may be causing the loss of voltage. Repair any open circuits as needed. | Multimeter, Wiring Diagram |
| Clear the Code and Test Drive | After completing repairs, clear the code using an OBD-II scanner and take the vehicle for a test drive to verify that the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure that the P2155 code has not returned. | OBD-II Scanner |
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