Cylinder 5 Misfire Detected

What it means

This code appears on engines with five or more cylinders and means the engine computer has seen cylinder 5 repeatedly fail to fire. The cause is usually its spark plug, ignition coil or injector.

Related codes: P0300P0304P0306P0355P0205P0273

Symptoms4

• Engine shaking at idle.
• Loss of power when accelerating.
• Check engine light on or flashing.
• Higher fuel consumption.

Possible causes6

• Worn spark plug in cylinder 5.
• Weak ignition coil for cylinder 5.
• Clogged or faulty cylinder 5 injector.
• Damaged wiring or connectors for this cylinder, especially near hot parts.
• Vacuum leak at the intake manifold gasket on that side.
• Low compression in the cylinder (less common).

How to diagnose5

1. Find cylinder 5 using the manufacturer's numbering, since its position on engines with two banks differs between makers.
2. Watch the misfire counter and check for lean or rich codes on the bank it belongs to.
3. Inspect the plug and swap the coil with another cylinder to see whether the misfire moves.
4. Check the injector, its signal and its connector.
5. Have a compression test done if ignition and fuel check out.

How to fix6

1. Replace the spark plug, preferably the full set if it is due.
2. Replace the faulty ignition coil.
3. Repair the wiring or connector.
4. Clean or replace the injector.
5. Fix the vacuum leak or the cause of low compression.
6. Clear the codes, road test and confirm the code does not return.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

The cost is low with a plug or coil, and rises when the cylinder is hard to reach and parts above it must be removed, or when an injector is needed.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions