What causes fault code P0293?

• Most likely: Faulty or clogged fuel injector on cylinder 11 (internal mechanical blockage or electrical fault). • Likely: High resistance or damaged wiring harness/connector for injector 11. • Possible: Internal engine mechanical issue (carbon buildup on valves, worn piston rings, or camshaft wear on cylinder 11). • Rare: Faulty crankshaft position sensor or damaged tone ring on the flywheel. • Rare: Internal Engine Control Unit (ECU) failure.

Powertrain (Engine & Gearbox)Standard EOBD

P0293 - Cylinder 11 Contribution/Balance Fault

Q: What are the symptoms of fault code P0293?

• Check Engine Light (MIL) illuminated. • Rough idling (vibrations or misfire feel). • Reduced engine performance and acceleration. • Decreased fuel economy. • Hard starting (especially during cold starts). • Vehicle may enter 'Limp home mode' to protect emission components.

Q: How do you fix fault code P0293?

STEP 1: Inspect the electrical connector for injector 11 for corrosion or loose pins. Measure the internal resistance of the injector (typically 12-16 Ohms for high-impedance injectors; check manufacturer specs). STEP 2: Use a diagnostic scan tool to perform a 'Cylinder Contribution Test' or 'Power Balance Test.' Monitor cylinder-specific fuel trim data. STEP 3: Check fuel pressure and perform an injector flow test. If a mechanical issue is suspected, conduct a compression or leak-down test on cylinder 11. STEP 4: Replace the fuel injector for cylinder 11. Ensure that the new injector code (e.g., IMA/IMA-code for diesels) is programmed into the ECU if required.

Last updated:1 February 2026

Related:Fuel Injector, Engine Control Unit (ECU/PCM), Crankshaft Position Sensor (CKP), Kablage och kontaktdon, om bensin

System

Powertrain (Engine & Gearbox)

Related Fault Codes

P0200

Injector Circuit Malfunction

P0201

Cylinder 1 Injector Circuit Open

P0202

Injector Circuit - Cylinder 2 - Malfunction

P0203

Injector Circuit - Cylinder 3

Technical Description

P0293 is triggered when the Engine Control Unit (ECU) detects that cylinder number 11 is contributing less power than the other cylinders. The ECU monitors the crankshaft speed fluctuations (angular acceleration) following each firing stroke using the crankshaft position (CKP) sensor. If the acceleration produced by cylinder 11 falls below a calibrated threshold relative to the average of the other cylinders, a contribution/balance fault is logged. This issue typically relates to fuel delivery (injector), mechanical compression, or ignition timing. The ECU may attempt to compensate by adjusting the fuel delivery (cylinder balancing), but once the limits of adjustment are exceeded, the code is stored.

Possible Causes

Faulty or clogged fuel injector on cylinder 11 (internal mechanical blockage or electrical fault).

High resistance or damaged wiring harness/connector for injector 11.

Internal engine mechanical issue (carbon buildup on valves, worn piston rings, or camshaft wear on cylinder 11).

Faulty crankshaft position sensor or damaged tone ring on the flywheel.

Internal Engine Control Unit (ECU) failure.

Symptoms

Check Engine Light (MIL) illuminated.

Rough idling (vibrations or misfire feel).

Reduced engine performance and acceleration.

Decreased fuel economy.

Hard starting (especially during cold starts).

Vehicle may enter 'Limp home mode' to protect emission components.

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P0293 - Cylinder 11 Contribution/Balance Fault

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P0293 - Cylinder 11 Contribution/Balance Fault

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