Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of your car that helps inject fuel into the first cylinder. It's like a switch that is stuck in the 'on' position, making the car's computer unhappy.
The code indicates that the electrical circuit controlling the low side of the hydrogen injector for cylinder 1 is experiencing higher than expected voltage.
The P316F code is triggered when the Engine Control Module (ECM) detects a high voltage condition in the low side circuit of the hydrogen injector for cylinder 1. This could be due to a short to voltage or a malfunction within the injector itself.
• Check Engine Light is on
• Poor engine performance
• Increased fuel consumption
• Faulty hydrogen injector
• Wiring short to voltage
• Faulty ECM
ECM: Engine Control Module
Injector: A device that delivers fuel into the engine's cylinders
• Use an OBD-II scanner to confirm the code.
• Inspect wiring and connectors for damage or shorts.
• Test the injector for proper operation.
• Replace faulty hydrogen injector.
• Repair or replace damaged wiring.
• Replace or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Toyota Mirai
• Honda Clarity Fuel Cell
• Hyundai Nexo
• Regular maintenance checks
• Inspect wiring for wear and tear
• Keep fuel system clean
Injector Circuit Issue
• Avoid driving long distances until repaired.
• Get the vehicle inspected by a professional.
• Monitor fuel consumption for any changes.
Check with the manufacturer for specific warranty coverage on emissions-related components.
The P316F code has been associated with hydrogen fuel cell vehicles as these systems become more prevalent.
Moderate – Should be addressed soon to avoid potential engine damage.
Driving with this code may not comply with emissions regulations and could lead to further engine issues.
• Engine at operating temperature
• Vehicle in idle or driving condition
The hydrogen injector for cylinder 1 is typically located near the engine block, connected to the fuel rail.
Q: Can I drive my car with a P316F code?
A: It's not recommended to drive for long distances as it could lead to further damage.
Q: How urgent is a P316F code?
A: It's moderately urgent and should be addressed soon to prevent engine performance issues.
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