Injector Circuit Range/Performance Problem (Cylinder 1)
There’s an issue with the injector's electrical circuit on cylinder 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 truck's computer noticed that the fuel injector for cylinder 1 isn't getting the right signals, meaning it might not be working correctly. This can affect how well the engine runs.
What the computer is actually seeing
The PCM (Powertrain Control Module) monitors the voltage and resistance in the injector circuit. If the voltage reading is outside the expected range when the injector is activated, it triggers this code.
What a healthy reading looks like
The injector should receive approximately 12V when activated, and the resistance should be around 12-16 ohms.
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 connector to the injector for damage or corrosion. If damaged, repair them and retest.
- 22. Measure the voltage at the injector connector with the key on and engine off. You should see around 12V. If not, check for a blown fuse or wiring issues back to the PCM.
- 33. Check the resistance of the injector itself. Disconnect the injector and measure across its terminals; it should read between 12-16 ohms. If not, replace the injector.
- 44. If the injector and wiring are good, check the PCM by testing for output voltage to the injector while cranking the engine. If there’s no voltage, the PCM might be faulty.
Common causes
- Faulty injector
- Wiring issues in the injector circuit
- Bad connector at the injector
- Short or open circuit
- Failed PCM
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's not recommended to drive extensively with this code. It can lead to engine performance issues and potentially damage the catalytic converter.
Will this code come back after I clear it?
If the underlying issue isn’t fixed, the code will likely return after a short drive cycle.
Why does this code pair with others like P0260?
These codes indicate similar issues in the fuel injector circuits; one could be a primary issue while others may occur due to related circuit faults.
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