Fuel Injector Group Supply Voltage Circuit/Open
The P216A code indicates that the powertrain control module (PCM) has detected an open or short circuit in the supply voltage circuit for a group of fuel injectors. This can cause the injectors to not receive proper voltage, leading to misfires, poor fuel economy, and potential engine damage if not addressed.
01. Most Common Causes
- Blown fuse or fusible link for injector power supply
- Open or shorted wiring in the injector harness
- Faulty fuel injector driver in the PCM
- Corroded or loose connector at injector or PCM
02. Symptoms You Will Notice
- Engine misfire or rough idle
- Check Engine Light illuminated
- Decreased fuel economy
- Engine may not start or stalls
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P216A and check for related codes.
Step 2: Inspect the fuel injector fuse and replace if blown.
Step 3: Visually inspect wiring and connectors for damage, corrosion, or looseness.
Step 4: Measure voltage at the injector harness with a multimeter (should be battery voltage with key on).
Step 5: If voltage is missing, check continuity from fuse to injector; if present, suspect PCM issue.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
No, driving with P216A can cause engine misfires, poor performance, and potential catalytic converter damage. It's best to have it diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs vary from $100 to $300, depending on the cause. A blown fuse is cheap, while wiring repairs or PCM replacement can be more expensive.