Fuel Injectors - Power Supply Circuit Low Voltage
The fuel injector’s power supply circuit is registering low voltage.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The fuel injectors aren’t getting enough power to work right, which can cause engine performance issues.
What the computer is actually seeing
The Engine Control Module expects to see a voltage supply to the fuel injectors around 12-14 volts. When it sees less than 10 volts, it sets this code.
What a healthy reading looks like
Expected voltage range for fuel injectors is 12-14 volts.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the vehicle battery voltage; should be above 12 volts. If not, charge or replace the battery.
- 22. Inspect wiring and connectors to the fuel injectors for damage or corrosion. Repair as needed.
- 33. Use a multimeter to measure the voltage at the injector connector with the ignition on; should be 12-14 V. If not, track the issue back to the ECM or main power supply.
- 44. If voltage is good, check the fuel injector driver in the ECM by running a performance test or swap with a known-good component.
Common causes
- Damaged wiring or connectors to the fuel injectors.
- Failed fuel injector driver in the ECM.
- Weak battery or poor connections affecting voltage supply.
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not ideal. Low injector voltage can cause poor engine performance and emissions issues.
Will this code come back after clearing it?
It can return if the underlying issue isn't resolved, particularly if wiring or the ECM is faulty.
Why does this code pair with SPN 3511?
SPN 3511 indicates a specific injector issue, often related to low voltage problems affecting multiple injectors.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
Start guided diagnostic →