Cylinder #2 Imbalance Error
P219D indicates that the engine control module (ECM) has detected an air-fuel ratio imbalance specifically in cylinder #2. This means the cylinder is running either too rich or too lean compared to the others, which can cause misfires, reduced fuel economy, and increased emissions. Common causes include vacuum leaks, fuel injector issues, or ignition problems.
1. Most Common Causes
- Vacuum leak near cylinder #2
- Faulty fuel injector on cylinder #2
- Weak or faulty spark plug or ignition coil on cylinder #2
- Intake manifold gasket leak
- Exhaust leak before oxygen sensor
2. Symptoms You Will Notice
- Check Engine Light on
- Rough idle or misfire
- Poor fuel economy
- Hesitation or stumbling during acceleration
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Inspect for vacuum leaks using a smoke machine or propane enrichment.
Step 3: Check fuel injector pulse and spray pattern on cylinder #2.
Step 4: Test spark plug and ignition coil on cylinder #2.
Step 5: Perform a cylinder contribution test to isolate the imbalance.
4. 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 performance.
How much does it cost to fix?▼
Costs vary from $50 for a simple vacuum leak repair to $150 for a fuel injector replacement, plus diagnostic fees.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.