Fuel Injector Group Supply Voltage Circuit/Open
The P216D 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 be caused by a faulty injector, damaged wiring, or a failed PCM. The injector group may not operate properly, leading to engine misfires, poor fuel economy, and potential drivability issues.
1. Most Common Causes
- Open or shorted wiring in the injector group supply circuit
- Faulty fuel injector in the affected group
- Corroded or loose connector at the injector or PCM
- Failed PCM (rare)
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Poor fuel economy
- Hard starting or stalling
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect wiring and connectors for damage or corrosion.
Step 3: Use a multimeter to check for voltage at the injector group supply circuit.
Step 4: Perform a resistance test on each injector in the group.
Step 5: If no issues found, test the PCM output for the injector group.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as it can cause engine damage and poor performance. Have it diagnosed promptly.
How much does it cost to fix?▼
Typical repair costs range from $50 to $150 for diagnosis and simple wiring repairs, but injector replacement can be higher.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.