Injector Circuit Malfunction - Cylinder 6
The engine's computer detected a problem with the fuel injector on cylinder 6 — it's like a spray nozzle that won't work properly, so fuel isn't being delivered correctly to that cylinder. This causes misfires, rough running, and poor fuel economy.
The ECM monitors the injector's electrical circuit by measuring voltage and current during the fuel injection pulse. It detects opens, shorts, or abnormal resistance in the wiring or injector coil. If the circuit doesn't respond as expected within normal operating parameters, a fault is triggered.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Injector Driver Voltage | 10-14V during activation | Below 5V or above 16V, or no voltage detected |
| Injector Circuit Resistance | 10-16 ohms (typical) | Infinite resistance (open) or less than 2 ohms (short) |
Code P0207 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, P0207 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.