Injector wiring on cylinder 3 chafed or shorted to earth; Faulty cylinder 3 injector with internal short or low coil resistance; Corroded, loose or damaged injector connector or terminals; Poor or damaged connection at the engine control unit connector; Low supply voltage or fault in the injector power supply or relay feed; Internal injector driver fault in the engine control unit.

P0267

Cylinder 3 Injector A Circuit Low.

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)
67: FaultThe specific fault in that area

What it means

P0267 means the engine control unit has detected a low voltage or low signal in the control circuit for the cylinder 3 fuel injector (injector A). The control unit monitors the injector driver circuit and sets the code when the voltage or current is lower than expected, which usually points to a short to earth or excessive resistance to the supply side of the circuit. Exact circuit design and monitoring strategy vary by engine and fuel system.

Symptoms

Engine management light on
Misfire or rough running on cylinder 3
Rough idle
Hesitation or loss of power
Hard starting or extended cranking
Increased fuel consumption

Possible causes

Injector wiring on cylinder 3 chafed or shorted to earthlikely
Faulty cylinder 3 injector with internal short or low coil resistancelikely
Corroded, loose or damaged injector connector or terminalslikely
Poor or damaged connection at the engine control unit connectorpossible
Low supply voltage or fault in the injector power supply or relay feedpossible
Internal injector driver fault in the engine control unitrare

How to diagnose

Read all stored codes and freeze frame data, noting engine temperature, load and battery voltage when the fault set, and check for other injector or misfire codes
Check for relevant technical service bulletins and confirm whether the fault is current or intermittent by clearing the code and retesting
Visually inspect the cylinder 3 injector connector and wiring for chafing, heat damage, corrosion, water ingress and bent or pushed-back pins
Check battery condition and charging voltage, and confirm the injector power feed is present with the ignition on
Measure the injector coil resistance and compare it with the manufacturer specification for your engine
With the harness disconnected, test the injector circuit wiring for continuity and for a short to earth or to the neighbouring circuits
Wiggle-test the harness with the engine running or the circuit being monitored to find intermittent faults
Use a scan tool injector activation test or a suitable scope to check the driver signal at the injector, following the manufacturer procedure for your model

How to fix

Repair or replace damaged wiring between the control unit and the cylinder 3 injector
Clean, repair or replace the injector connector and terminals
Replace the cylinder 3 injector if its resistance or operation is out of specification, following the correct procedure for your fuel system
Restore a good power supply by repairing the feed circuit, relay or fuse connection if it is faulty
Repair or replace the engine control unit only after wiring and injector faults have been ruled out and the driver fault is confirmed

Can I keep driving?

Medium severity

The car can usually be driven short distances, but a misfiring cylinder can lead to poor running, higher emissions and possible catalytic converter damage, so get it fixed soon. Avoid heavy loads and stop driving if the engine runs very badly or the warning light flashes.

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