Injector Circuit High Voltage - Fault Detected
This code indicates a high voltage situation in the injector circuit.
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 computer sees higher voltage than it's supposed to in the fuel injector circuit, which can cause the injector not to work right.
What the computer is actually seeing
The Engine Control Module (ECM) sees voltage levels above 5 volts on an open circuit or while the injector is supposed to be off.
What a healthy reading looks like
Injector circuit voltage should be around 0 – 1 volt when off, and around 12 – 14 volts when energized.
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 injector connector and wiring for damage or corrosion. If found, repair or replace as necessary.
- 22. Measure the voltage at the injector connector with the ignition on (engine off). It should be close to battery voltage (12-14V). If voltage is too high (above 14V), check for short circuits to the power supply.
- 33. Test the resistance of the fuel injector (typically should be between 12-16 ohms). If resistance is outside this range, replace the injector.
- 44. If the injector tests good, check the ground circuit for continuity and integrity. Fix any issues found.
- 55. If all checks are good, consider testing or replacing the ECM.
Common causes
- Faulty fuel injector
- Short circuit in injector wiring
- Poor ground connection or corroded connector
- Defective ECM
- Aftermarket modifications to the fuel system
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
Moderate severity indicates you should fix this soon to prevent drivability issues.
Will the code come back after clearing it?
Yes, if the underlying issue isn't fixed, the code will likely return.
Does this relate to performance issues?
Yes, a faulty injector can cause rough running, misfires, or reduced power.
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