Cylinder 11 Contribution/Balance Fault
Code P0293 indicates that cylinder 11 is not contributing equally to engine power compared to other cylinders. This is detected by the engine control module (ECM) monitoring crankshaft acceleration during each cylinder's power stroke. A misfire or weak combustion in cylinder 11 causes a noticeable imbalance, often due to fuel, ignition, or mechanical issues.
01. Most Common Causes
- Faulty fuel injector on cylinder 11
- Ignition coil or spark plug failure on cylinder 11
- Low compression in cylinder 11 (e.g., worn rings, valve issues)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or engine misfire
- Reduced power and fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Perform a cylinder contribution test using a scan tool to confirm cylinder 11 imbalance.
Step 3: Inspect spark plug and ignition coil on cylinder 11; swap with another cylinder to see if misfire follows.
Step 4: Check fuel injector operation on cylinder 11 (resistance, flow, or swap test).
Step 5: Perform a compression test on cylinder 11 and compare to others.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause catalytic converter damage and reduced performance. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
Costs vary: spark plugs $50-$150, ignition coil $100-$250, fuel injector $150-$500, or compression repairs $500-$2000. Diagnosis typically $100-$150.