Cylinder #2 High To Low Side Short
Cylinder 2's fuel injector circuit has a short between the high and low voltage sides, like a wire touching where it shouldn't. The ECU can't properly control fuel delivery to that cylinder.
The ECU monitors the fuel injector driver circuit's voltage and current flow for cylinder 2. It expects proper on/off switching with isolated high and low sides. A short circuit causes abnormal voltage levels or current draw that the ECM detects as a fault condition.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Injector voltage differential | 12V peak-to-peak switching with proper isolation | Voltage collapse or unwanted current path between high/low sides |
| Injector circuit resistance | 12-16 ohms nominal coil resistance | Resistance drops below threshold indicating short path |
Code P1267 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, P1267 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.