What Does P0265 Mean?
The ECM has detected that the cylinder 2 fuel injector circuit voltage is above the expected maximum threshold, indicating a high condition. This typically results from an open circuit at the injector or wiring, a short to battery voltage in the control wire, or an internally open injector coil. Cylinder 2 will not receive fuel properly, causing a dead miss on that cylinder.
Common Causes
35%
Open circuit in the cylinder 2 injector wiring or disconnected connector
25%
Failed cylinder 2 fuel injector with open coil winding
25%
Short to battery voltage in the cylinder 2 injector control wire
15%
ECM injector driver high-side circuit fault
Diagnostic Steps
1
Step 1: Verify the cylinder 2 injector connector is fully seated and locked — check for broken locking tab or pushed-back pins.
2
Step 2: Measure the injector coil resistance — open reading (OL) confirms internal coil failure. Normal is 11-18 ohms for high-impedance injectors.
3
Step 3: With injector disconnected, check the control wire for shorts to battery voltage using a DVOM.
4
Step 4: Inspect the wiring harness routing for damage near power distribution or high-voltage circuits.
5
Step 5: Swap cylinder 2 injector with an adjacent cylinder and monitor for code migration to confirm the fault source.
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The ECM has detected that the cylinder 2 fuel injector circuit voltage is above the expected maximum threshold, indicating a high condition. This typically results from an open circuit at the injector or wiring, a short to battery voltage in the control wire, or an internally open injector coil. Cyl...
The most common cause of P0265 (Cylinder 2 Injector Circuit High) is: Open circuit in the cylinder 2 injector wiring or disconnected connector
Typical repair costs for P0265 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Engine will misfire on cylinder 2 causing rough idle and power loss. Drivable for short distances but prolonged operation risks catalytic converter damage.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0265 to identify the root cause.
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Quick Info
Category
Powertrain
System
Fuel Injection System
Difficulty
Type
Generic (SAE)
Recommended Tools
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