Fuel Injector Group Supply Voltage Circuit High
The P216F code indicates that the powertrain control module (PCM) has detected a voltage level in the fuel injector group supply circuit that is higher than the specified range. This circuit provides power to a group of fuel injectors, typically through a relay or fuse. A high voltage condition can be caused by a short to voltage, a faulty voltage regulator, or a malfunctioning PCM. This can lead to excessive current flow, potentially damaging injectors or the PCM.
1. Most Common Causes
- Short to voltage in the injector group supply circuit
- Faulty fuel injector driver module or PCM
- Failed voltage regulator or alternator overcharging
- Corroded or damaged wiring/connectors
2. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Poor fuel economy
- Engine may not start or stalls
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to retrieve all codes and freeze frame data.
Step 2: Inspect the fuel injector group supply circuit for shorts to voltage or ground.
Step 3: Test the voltage at the injector group supply connector with the engine running; should be battery voltage.
Step 4: Check the alternator output voltage to ensure it is within spec (13.5-14.5V).
Step 5: If voltage is high, repair short or replace faulty component (PCM, relay, etc.).
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended. High voltage can damage fuel injectors and the PCM, leading to costly repairs. Have the vehicle diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs vary from $150 to $400 depending on the cause. Simple wiring repairs are cheaper, while PCM replacement can be more expensive.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.