Wiring or connector fault on the cylinder 6 injector circuit, such as high resistance, corrosion, chafing or a loose pin; Cylinder 6 injector with faulty coil or internal resistance out of specification, or a sticking injector; Low or unstable supply voltage to the injector, caused by a weak battery, poor earth or charging fault; Fuel pressure problem affecting injector performance, such as a weak pump or a faulty pressure regulator (depends on the fuel system type); Fault in the injector driver circuit inside the engine control unit; Previous poor repair or damage to the engine harness near cylinder 6.

P02F3

Cylinder 6 Injector Circuit Range/Performance.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
2: AreaFuel and air metering (injector circuit)
F3: FaultThe specific fault in that area

What it means

P02F3 is the generic code for a range or performance fault in the cylinder 6 fuel injector circuit. The engine control unit has monitored the injector circuit or its response and found it outside the expected range, without it being a plain open or short circuit. The exact test used to set the code depends on the manufacturer and engine.

Symptoms

Engine misfire or rough running, especially at idle
Illuminated engine warning light
Hesitation or loss of power under load
Poor fuel economy
Hard starting or extended cranking
Smell of unburnt fuel from the exhaust

Possible causes

Wiring or connector fault on the cylinder 6 injector circuit, such as high resistance, corrosion, chafing or a loose pinlikely
Cylinder 6 injector with faulty coil or internal resistance out of specification, or a sticking injectorlikely
Low or unstable supply voltage to the injector, caused by a weak battery, poor earth or charging faultpossible
Fuel pressure problem affecting injector performance, such as a weak pump or a faulty pressure regulator (depends on the fuel system type)possible
Fault in the injector driver circuit inside the engine control unitrare
Previous poor repair or damage to the engine harness near cylinder 6rare

How to diagnose

Read all stored and pending codes and the freeze frame data, noting engine temperature, load, speed and battery voltage when the fault set
Check for other injector, misfire or fuel pressure codes that may point to a common cause
Visually inspect the cylinder 6 injector connector and the wiring for damage, heat, rubbing, corrosion or water ingress
Check battery condition, charging voltage and main earth connections
Measure the cylinder 6 injector coil resistance and compare it with the manufacturer's specification for that engine
Check the wiring between the injector and the control unit for resistance and for shorts to earth or supply, following the wiring diagram
Watch live data and the fuel trims, and check fuel pressure against specification
Swap the injector with another cylinder if the procedure allows, and see whether the fault moves with it

How to fix

Repair or replace damaged wiring and clean or renew corroded connector terminals
Replace the cylinder 6 injector if it is found to be faulty, following the correct fitting procedure for that engine
Repair the battery, charging or earthing fault that is causing unstable voltage
Correct any fuel supply fault found, such as a failing pump or pressure control fault
Replace or repair the engine control unit only after the wiring and injector have been confirmed good

Can I keep driving?

Medium severity

The car may be driveable for a short time, but a misfiring or badly performing injector can lead to catalytic converter damage and engine damage. Have it diagnosed soon and avoid heavy loads, and stop driving if it runs very roughly or the warning light flashes.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.