Cylinder 3 Injector Circuit High
The engine's computer detected that the fuel injector for cylinder 3 is receiving too much electrical voltage, similar to a light switch stuck in the 'on' position. This prevents proper fuel spraying and causes the engine to run poorly.
The ECU monitors the voltage and current flowing through the injector circuit during operation. When the circuit voltage remains abnormally high or the injector stays energized longer than expected, the ECU triggers a fault. This typically indicates a short to power, open ground, or faulty injector driver.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Injector Circuit Voltage | 0-14.4V during operation | >14.4V or stuck high voltage |
| Injector Pulse Duration | 1.5-10ms at idle | Abnormally extended or constant signal |
Code P0269 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, P0269 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.