Fuel Injector Group Supply Voltage Circuit/Open
The P2149 code indicates a problem in the supply voltage circuit for a group of fuel injectors. This typically means the PCM has detected an open or short in the wiring or connector that provides power to the injector group. Common causes include damaged wiring, corroded connectors, or a faulty injector driver in the PCM. This can lead to misfires, poor fuel economy, and potential engine damage if not addressed.
01. Most Common Causes
- Open or short in the injector group supply wiring
- Corroded or damaged connector at the injector or PCM
- Faulty PCM (internal injector driver failure)
02. Symptoms You Will Notice
- Engine misfire or rough idle
- Check Engine Light illuminated
- Decreased fuel economy and performance
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P2149 and check for related codes.
Step 2: Visually inspect the injector group wiring and connectors for damage or corrosion.
Step 3: Test the supply voltage at the injector group connector with a multimeter (should be battery voltage with key on).
Step 4: If voltage is missing, check continuity from the connector back to the PCM and repair as needed.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. Driving with a fuel injector supply issue can cause misfires, catalytic converter damage, and poor engine performance.
How much does it cost to fix?▼
Repair costs typically range from $50 to $150 for wiring repairs, but could be higher if the PCM needs replacement.