Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer is having trouble controlling the relay that helps the fuel injectors work. It's like a switch not turning on the lights properly.
The P0612 code indicates a problem with the relay control circuit for the fuel injector control module. This means the car's computer is unable to manage the relay that powers the fuel injectors.
The P0612 code is set when the Powertrain Control Module (PCM) detects an issue with the relay control circuit for the fuel injector control module. This could be due to a malfunctioning relay, faulty wiring, or a problem within the control module itself.
• Check Engine Light is on
• Engine misfires or runs rough
• Reduced fuel efficiency
• Faulty fuel injector control module relay
• Wiring issues in the relay control circuit
• Defective Powertrain Control Module (PCM)
PCM: Powertrain Control Module, the vehicle's main computer that controls the engine and transmission.
Relay: An electrical switch that opens and closes under the control of another electrical circuit.
• Use an OBD-II scanner to confirm the code.
• Inspect the relay and associated wiring for damage.
• Test the fuel injector control module relay for proper operation.
• Replace the faulty relay.
• Repair or replace damaged wiring.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Relay tester
$100 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regularly inspect and maintain electrical connections.
• Ensure relays are functioning properly.
• Keep the engine control module updated.
Engine Performance
• Have the vehicle inspected by a professional if the Check Engine Light is on.
• Avoid driving the vehicle excessively until the issue is resolved.
Check if the vehicle's powertrain warranty covers the PCM or related components.
The P0612 code has been associated with vehicles experiencing relay control issues, often due to faulty wiring or relays.
Moderate – While the vehicle may still be drivable, it could lead to more significant issues if not addressed promptly.
Driving with a known issue in the fuel system can lead to safety hazards and may not comply with emissions regulations.
• Engine running
• Vehicle in park or neutral
The fuel injector control module relay is typically located in the engine bay, within the fuse and relay box.
Q: Can I drive with a P0612 code?
A: It's possible to drive, but it's not recommended as it can lead to further engine issues.
Q: How can I prevent a P0612 code?
A: Regular maintenance and inspections of the vehicle's electrical system can help prevent this code.
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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Fitment Required · Vehicle-fitment part
Commonly relevant for misfire, ignition-efficiency, and some drivability-related repairs.
Misfire and ignition-related faults commonly involve spark plugs as part of the repair path.
Check the correct plug type, gap, and engine application for your vehicle.
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Fitment Required · Vehicle-fitment part
Relevant when the fault points toward ignition-coil performance or cylinder-specific ignition issues.
Some ignition faults involve coil performance or cylinder-specific coil problems.
Match the coil to your engine and confirm the failed component before ordering.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.