Cylinder 11 Injection Timing Malfunction
The P021E code indicates that the Engine Control Module (ECM) has detected an incorrect injection timing for cylinder 11. This typically occurs when the fuel injector is not delivering fuel at the precise moment required for optimal combustion. The ECM monitors crankshaft and camshaft position sensor data to determine injection timing. A deviation can result from a faulty injector, wiring issues, or sensor problems, leading to reduced engine performance and increased emissions.
01. Most Common Causes
- Faulty fuel injector on cylinder 11
- Wiring or connector issues to injector 11
- Engine control module (ECM) software or hardware problem
- Crankshaft or camshaft position sensor malfunction
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Reduced fuel economy
- Loss of power or hesitation during acceleration
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and freeze frame data to identify related issues.
Step 2: Visually inspect the injector wiring and connector for cylinder 11 for damage or corrosion.
Step 3: Perform a fuel injector balance test or resistance check to verify injector operation.
Step 4: Check crankshaft and camshaft position sensor signals with a scope or scan tool.
Step 5: If no issues found, update ECM software or replace ECM as a last resort.
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 engine misfire, reduced performance, and potential damage to the catalytic converter.
How much does it cost to fix?▼
The cost typically ranges from $200 to $600, depending on whether the injector needs replacement or if it's a wiring issue.