Faulty ignition coil or spark plug specific to cylinder 11; Clogged or failing fuel injector for cylinder 11; Low compression in cylinder 11 due to worn piston rings, valves, or head gasket; Vacuum leak affecting the intake runner for cylinder 11; Wiring or connector issue at the cylinder 11 injector or coil; Mechanical valvetrain issue such as a collapsed lifter or worn cam lobe; Exhaust leak near the cylinder 11 exhaust port affecting oxygen sensor readings

DTC codes / P02xx · Fuel and air metering (injector circuits) / P0293

P0293Cylinder 11 Contribution/Balance

Q: What does code P0293 mean?

Cylinder 11 Contribution/Balance. P0293 indicates that the engine control module (ECM) has detected an abnormal contribution from cylinder 11 to overall engine power, typically by monitoring crankshaft speed fluctuations. The ECM compares the acceleration of the crankshaft during each cylinder's power stroke and flags this code when cylinder 11 consistently underperforms or overperforms relative to the others.

P0293 indicates that the engine control module (ECM) has detected an abnormal contribution from cylinder 11 to overall engine power, typically by monitoring crankshaft speed fluctuations. The ECM compares the acceleration of the crankshaft during each cylinder's power stroke and flags this code when cylinder 11 consistently underperforms or overperforms relative to the others.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaFuel and air metering (injector circuits)

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Rough idle or shaking, especially when the engine is cold
Noticeable misfire or hesitation during acceleration
Reduced engine power and poor fuel economy
Shaking or vibration felt through the steering wheel or seat
In some cases, the engine may enter limp mode to protect the catalytic converter

Common causes, most likely first

Faulty ignition coil or spark plug specific to cylinder 11
Clogged or failing fuel injector for cylinder 11
Low compression in cylinder 11 due to worn piston rings, valves, or head gasket
Vacuum leak affecting the intake runner for cylinder 11
Wiring or connector issue at the cylinder 11 injector or coil
Mechanical valvetrain issue such as a collapsed lifter or worn cam lobe
Exhaust leak near the cylinder 11 exhaust port affecting oxygen sensor readings

How to diagnose and fix it

Perform a visual inspection of the cylinder 11 ignition coil, spark plug, and injector connectors for damage or corrosion
Swap the ignition coil and spark plug from cylinder 11 with a known-good cylinder to see if the misfire moves
Use a scan tool to check for pending or stored misfire codes and review freeze-frame data
Run a compression test and a cylinder leak-down test on cylinder 11 to rule out mechanical faults
Test the fuel injector for cylinder 11 with a noid light or injector balance test
Check for vacuum leaks at the intake manifold and cylinder 11 intake runner using a smoke machine
If all else fails, perform a crankshaft position variation relearn or inspect the ECM for software updates

Cylinder 11 Contribution Codes Often Misdiagnosed

A dirty or failing mass airflow sensor can cause uneven fuel delivery that mimics a single-cylinder contribution fault, so check fuel trims before condemning cylinder 11.
On engines with active fuel management or cylinder deactivation, a stuck lifter or solenoid can disable cylinder 11 and set this code without any ignition or fuel fault.
Exhaust leaks upstream of the oxygen sensor can skew the ECM's misfire detection logic and falsely flag cylinder 11, especially on V-configuration engines.
A weak battery or charging system issue can cause voltage drops that disrupt injector or coil operation on one cylinder, leading to a false contribution code.
Always verify that the code is current and not history; a single misfire event during a cold start or low-fuel condition may store P0293 without a recurring problem.

Can I keep driving with P0293?

You can usually drive the vehicle short distances to a repair shop, but avoid heavy acceleration or towing because unburned fuel from a misfiring cylinder can overheat and damage the catalytic converter. If the check engine light is flashing, stop driving immediately and have the vehicle towed.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.