Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is getting too hot when trying to control the parts that make the car start and run.
This code indicates that the internal control module, which manages ignition and injector relay outputs, is experiencing an over-temperature condition.
The P1486 code is triggered when the internal control module detects an over-temperature condition in the ignition and injector relay output stage. This can be due to excessive current draw or a failure in the cooling system for the module.
• Check engine light on
• Engine misfiring
• Poor engine performance
• Faulty ignition or injector relay
• Poor electrical connections
• Cooling system failure for the control module
Control Module: A computer that manages various functions in a vehicle.
Relay: An electrical switch that opens and closes under the control of another electrical circuit.
• Check for any other related codes.
• Inspect the ignition and injector relays.
• Examine the control module for signs of overheating.
• Replace faulty relays.
• Repair any damaged wiring or connections.
• Ensure proper cooling for the control module.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $500
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regular maintenance of electrical connections
• Ensure proper cooling of engine components
• Regularly check for fault codes
Engine Performance
• Do not ignore the check engine light.
• Get the vehicle inspected by a professional if unsure.
• Monitor engine performance for changes.
Check with the vehicle manufacturer for warranty coverage on control modules.
This code has been associated with overheating issues in control modules in certain vehicle models.
Moderate – Should be addressed soon to prevent further damage.
Driving with an overheating control module can lead to engine performance issues and potential safety hazards.
• Engine running
• Electrical load applied
The control module is typically located in the engine bay or under the dashboard.
Q: What happens if I ignore this code?
A: Ignoring this code can lead to engine performance issues and potential damage to the control module.
Q: Can I drive my car with this code?
A: It's not recommended to drive for extended periods with this code active, as it can lead to further damage.
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Universal · Digital multimeter
A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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Universal · Wire connectors and repair kit
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.