Cylinder 1 Injector Circuit Low
The fuel injector for cylinder 1 isn't receiving enough electrical current from the engine computer. Think of it like a speaker not getting enough power—it won't work properly even if the audio signal is being sent.
The ECM monitors the voltage and current flowing through the cylinder 1 injector circuit during activation. It detects if the injector coil resistance is too high, the circuit is open, or there's insufficient current draw compared to expected values.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Injector Circuit Current | 2-4 amps during pulse | Below 1.5 amps or open circuit |
| Injector Resistance | 12-16 ohms (high-impedance injector) | Above 20 ohms or infinite (open) |
Code P0262 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0262 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.