How is fault code P0262 fixed?

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Pull the codes and look at live data. Note the injector pulse width on cylinder 1 and whether the ECU has cut fuelling to it 2. Get the connector off and inspect it properly. Green corrosion on the pins, a spread terminal, or a connector full of oil will cause exactly this. Wiggle-test the loom back from the plug looking for chafe points 3. Measure the injector resistance with a multimeter, ignition off and connector unplugged. Most petrol injectors read roughly 12 to 16 ohms; a reading way off that or open circuit condemns the injector 4. Back-probe the circuit and do a voltage drop test at the ECU driver pin while the injector is commanded. A reading well above the normal switched value points at high resistance or an open in the wiring 5. If the injector, the wiring and the earth all check out, you're looking at the ECU driver, and that's the last thing to suspect, not the first 6. Check for any TSBs on your model, some makes have known connector or loom issues on this circuit

Cylinder 1 Injector Circuit Low

Jump to the fix

Severity

Medium

Can I keep driving?

Usually drivable, but get it diagnosed without delay.

First step

A typical diagnostic sequence used by mechanics, provided here for educational reference only. Diagnostic work should be performed by a qualified mechanic with the appropriate tools and training. 1. Pull the codes and look at live data. Note the injector pulse width on cylinder 1 and whether the ECU has cut fuelling to it 2. Get the connector off and inspect it properly. Green corrosion on the pins, a spread terminal, or a connector full of oil will cause exactly this.

PPowertrain
0Generic code
2Fuel / Air
62Sequence number

What does it mean?

P0262 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Cylinder #1 Injector Circuit High . This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

Symptoms

Likely causes

How to fix it

Codes From the Same System

All Fault Codes

Related Similar Codes

This information follows the generic OBD-II definition and does not replace a vehicle-specific diagnosis. The severity rating is rule-based; an authorised diagnostic reading is required for a definitive answer.