How is fault code P0268 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. Plug in a scanner and read the freeze frame data so you know when it set, then clear it and drive to see if it comes straight back or is intermittent 2. Unplug the cylinder 3 injector connector and look hard at it. Green crust, bent pins, a loose terminal or damp inside is your answer most of the time. Clean it up and add a touch of dielectric grease 3. Follow the loom by hand and eye, checking for chafing or melted insulation where it passes anything hot or sharp 4. With the injector unplugged, put an ohmmeter across its terminals. Petrol injectors usually read in the low ohms, often around 12 to 16 ohms, while some diesel units sit much lower. Anything wildly off, or open circuit, condemns the injector 5. Check the harness for a short to battery voltage or to ground with a multimeter, which is what causes the 'high' reading 6. Only when the wiring and injector check out should you look at the ECU or, where fitted, the separate injector driver module

Cylinder 3 Injector Circuit High

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. Plug in a scanner and read the freeze frame data so you know when it set, then clear it and drive to see if it comes straight back or is intermittent 2. Unplug the cylinder 3 injector connector and look hard at it.

PPowertrain
0Generic code
2Fuel / Air
68Sequence number

What does it mean?

P0268 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Cylinder #3 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.