Faulty cylinder 8 injector with an internal short or very low winding resistance; Injector control wire chafed or shorted to ground or to another wire; Corroded, damaged or loose injector connector or terminals; Damaged section of the wiring loom, for example from heat, rubbing or previous repair work; Water ingress or oil contamination in the connector or loom; Fault in the injector driver inside the engine control unit.

P0282

Cylinder 8 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)
82: FaultThe specific fault in that area

What it means

P0282 means the engine control unit has detected a low voltage condition in the control circuit for the cylinder 8 fuel injector (injector A on engines with more than one injector per cylinder). The control unit monitors the injector driver and sets the code when the circuit voltage is lower than expected, which points to a short to ground or a fault in the injector winding or its wiring.

Symptoms

Malfunction indicator lamp on
Engine misfire or rough running, mainly on one cylinder
Reduced power and poor acceleration
Rough idle or hesitation
Increased fuel consumption or a fuel smell from the exhaust
Engine may enter limp mode on some models

Possible causes

Faulty cylinder 8 injector with an internal short or very low winding resistancelikely
Injector control wire chafed or shorted to ground or to another wirelikely
Corroded, damaged or loose injector connector or terminalslikely
Damaged section of the wiring loom, for example from heat, rubbing or previous repair workpossible
Water ingress or oil contamination in the connector or loompossible
Fault in the injector driver inside the engine control unitrare

How to diagnose

Read all stored and pending codes and the freeze frame data, noting engine speed, load and temperature when the fault set. Look for other injector or misfire codes on cylinder 8.
Check for any relevant technical service bulletins for the specific model and engine.
Visually inspect the cylinder 8 injector connector, terminals and the loom along its route for chafing, heat damage, corrosion or moisture.
Check the injector supply voltage and ground at the connector against the manufacturer's data for the engine.
With the battery disconnected and the connector unplugged, measure injector winding resistance and compare it with the specification. Also test the control wire for a short to ground and for continuity back to the control unit.
Check the injector drive signal with a scope or suitable test light while cranking, to see if the control unit is switching the circuit.
If the wiring tests good, swap the injector with another cylinder where the layout allows, clear the code and see whether the fault follows the injector.
Only after wiring and injector are proven good, consider testing or replacing the control unit, following the manufacturer's procedure.

How to fix

Replace the cylinder 8 injector if its resistance is out of specification or it fails the swap test, using new seals and following the correct fitting procedure for the engine.
Repair or replace the damaged wiring section, using proper soldered and sealed joints or a manufacturer-approved repair loom.
Clean, repair or replace corroded or loose connector terminals and refit the connector securely.
Cure the cause of any water or oil ingress, then dry or replace the affected connector.
Replace or repair the engine control unit only if a driver fault inside it is confirmed, and carry out any required programming or coding.

Can I keep driving?

Medium severity

The car can usually be driven short distances to get it repaired, but expect reduced performance. Avoid heavy loads and stop driving if the engine misfires badly or the warning lamp flashes, as unburnt fuel can damage the catalytic converter.

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