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 wiring or connection that controls how fuel is injected into the first cylinder of the engine. It's like if a light switch isn't working because the wire is loose.
The code P316E indicates an issue with the electrical circuit responsible for controlling the low side of the hydrogen injector for cylinder 1. This could be due to a short, open circuit, or poor connection.
P316E is triggered when the Engine Control Module (ECM) detects a low voltage condition in the low side circuit of the hydrogen injector for cylinder 1. This could be caused by a fault in the wiring, a poor connection, or a failure in the injector itself. The low side circuit is responsible for completing the electrical path to ground, allowing the injector to operate correctly.
• Check Engine Light (CEL) illuminated
• Poor engine performance
• Increased emissions
• Faulty wiring or connection to the injector
• Failed hydrogen injector
• Faulty ECM or driver circuit
ECM: Engine Control Module, the computer that controls engine functions.
Injector: A device that sprays fuel into the engine's cylinders.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the injector.
• Test the injector for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the hydrogen injector if faulty.
• Replace or reprogram the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Toyota Mirai
• Hyundai Nexo
• Honda Clarity Fuel Cell
• Regularly inspect and maintain vehicle wiring.
• Ensure proper connections during vehicle servicing.
• Use quality fuel and parts.
Engine Performance
• Get the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid driving the vehicle hard until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on emissions-related components.
This code is relatively new and specific to hydrogen fuel cell vehicles, reflecting the evolution of automotive technology.
Moderate – Addressing this issue soon will prevent further engine performance problems.
Driving with a malfunctioning injector can lead to increased emissions and potential engine damage.
• Engine running
• Vehicle at operating temperature
The hydrogen injector for cylinder 1 is located on the engine, typically near the cylinder head.
Q: Can I drive my car with this code?
A: It's best to address the issue soon. Driving with this code can lead to poor performance and increased emissions.
Q: Will this code clear itself?
A: The code may clear if the issue is resolved, but it often requires manual clearing with an OBD-II scanner.
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