The P2147: Fuel Injector Group ‘A’ Supply Voltage Circuit Low indicates that the voltage in the fuel injector group ‘A’ supply circuit is lower than expected. This can be due to a faulty fuel injector, wiring problems, or an issue with the power supply to the injectors.
P2147 – Quick Overview
| Code | Information |
|---|---|
| Meaning | P2147: Fuel Injector Group ‘A’ Supply Voltage Circuit Low |
| Is it serious? | Yes, it can cause engine misfires, poor performance, or failure to start due to insufficient fuel injection. |
| Possible causes | – Low voltage in the fuel injector group ‘A’ supply circuit – Faulty fuel injector group ‘A’ – Wiring issues or power supply problems |
| How to diagnose? | – Measure voltage in the fuel injector group ‘A’ supply circuit – Test the fuel injector group ‘A’ – Inspect wiring and connections |
P2147 Meaning
The P2147 code indicates that the voltage supplied to fuel injector group ‘A’ is lower than the required specification. This can disrupt fuel delivery, leading to engine performance problems such as misfires, reduced power, or engine stalling. The issue could be caused by faulty wiring, a bad injector, or an issue with the power supply circuit.
Step-by-step diagnostic guide
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes that might provide more insight into the cause of the low voltage issue. | OBD-II Scanner |
| Inspect Wiring and Connectors | Visually inspect the wiring and connectors for fuel injector group ‘A’ for signs of damage, loose connections, or corrosion. Repair or replace any damaged components as necessary. | Flashlight, Multimeter |
| Measure Voltage in the Supply Circuit | Use a multimeter to measure the voltage at the fuel injectors in group ‘A’. Compare the readings with the manufacturer’s specifications to confirm if the voltage is lower than required. | Multimeter |
| Test the Fuel Injectors | Use a diagnostic tool to test the functionality of the fuel injectors in group ‘A’. Ensure they are operating within the correct parameters and replace any faulty injectors. | Diagnostic Tool, Multimeter |
| Inspect Power Supply Components | Check the power supply components (such as the fuse, relay, and ECU) that provide power to the injectors. Ensure they are functioning correctly and delivering the appropriate voltage. | Multimeter, Wiring Diagram |
| Check for Shorts or Grounding Issues | Use a multimeter to check for any shorts to ground or open circuits in the wiring leading to fuel injector group ‘A’. Repair any wiring issues that may be causing low voltage. | Multimeter, Wiring Diagram |
| Clear the Code and Test Drive | After repairs or adjustments, clear the code using an OBD-II scanner and take the vehicle for a test drive to confirm the issue is resolved. | OBD-II Scanner |
| Recheck for Codes | After the test drive, re-scan the vehicle to ensure the P2147 code has not returned. | OBD-II Scanner |
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