Cylinder #3 Imbalance Error
P219E indicates that the engine control module (ECM) has detected a significant air-fuel ratio imbalance specifically in cylinder #3. This means cylinder #3 is running either too rich or too lean compared to the other cylinders, which can cause rough idling, misfires, and reduced fuel efficiency. The imbalance is often due to fuel delivery issues, vacuum leaks, or ignition problems affecting that cylinder.
01. Most Common Causes
- Faulty fuel injector on cylinder #3
- Vacuum leak near cylinder #3 intake runner
- Weak or faulty spark plug or ignition coil on cylinder #3
- Low compression in cylinder #3 due to worn rings or valves
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Rough idle or engine misfire
- Decreased fuel economy
- Hesitation or stumbling during acceleration
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data to confirm cylinder #3 is the issue.
Step 2: Perform a visual inspection of cylinder #3 components: spark plug, ignition coil, fuel injector, and intake vacuum lines.
Step 3: Swap the fuel injector from cylinder #3 to another cylinder and see if the code follows; if so, replace the injector.
Step 4: Check compression on cylinder #3; if low, perform a leak-down test to identify internal engine damage.
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 the imbalance can cause catalytic converter damage and poor engine performance. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
Costs vary: replacing a spark plug or coil is $50-$150; a fuel injector replacement is $150-$400; internal engine repairs can exceed $1000.