Injector Group 1 - Faulty
Indicates a fault has been detected with Injector Group 1.
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 engine's computer has spotted an error with one of the fuel injectors, which means it might not be injecting enough fuel or it's malfunctioning.
What the computer is actually seeing
The engine control module sees an abnormal signal or a lack of signal from the injector, which can cause poor performance or misfires.
What a healthy reading looks like
Injector on-time should be between 4-10 ms under typical operating conditions, and voltage should be constant at around 12-14 volts while activated.
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 wiring and connectors for Injector Group 1 for any damage or corrosion. Repair as necessary.
- 22. Use a multimeter to test the voltage at the injector connector while the engine is running. It should read between 12-14 volts.
- 33. Measure the resistance of the injector coil. It should be between 12-16 ohms. If it's outside this range, replace the injector.
- 44. Swap the suspect injector with another known good injector. Check if the code changes to that injector.
- 55. If the issue persists, connect a scanner to check for other related fault codes or perform a fuel injector balance test.
Common causes
- Failed fuel injector
- Wiring issues in injector harness
- Faulty ECU's fuel injector control
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It’s better to fix it soon as it can lead to increased emissions and poor performance, but it may still be drivable for a short time.
Will this code come back after clearing it?
If the underlying issue isn't addressed, the code will likely return after further operation.
Why does this code appear with SPN 6360?
That code often relates to the overall injector system failure, while SPN 6361 points to a specific injector group's fault.
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 →