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 part of the car that helps detect if the engine is running smoothly is not getting the right amount of power. It's like trying to watch TV with a bad power cord.
The Ion Sense Module is a component that monitors the combustion process in the engine. This code indicates that there is a problem with the voltage supply to this module.
The Ion Sense Module is responsible for detecting combustion events by measuring ionization currents in the combustion chamber. The P28C0 code indicates that the supply voltage to this module is outside the specified range, which can affect its ability to accurately monitor combustion.
• Check Engine Light is on
• Poor engine performance
• Increased emissions
• Faulty Ion Sense Module
• Wiring issues such as shorts or opens in the circuit
• Malfunctioning power supply to the module
Ion Sense Module: A device that monitors combustion by measuring ionization currents.
Voltage Supply: The electrical power provided to a component.
• Check for any blown fuses related to the Ion Sense Module.
• Inspect the wiring and connectors for damage or corrosion.
• Test the voltage supply to the Ion Sense Module.
• Replace any blown fuses.
• Repair or replace damaged wiring or connectors.
• Replace the Ion Sense Module if faulty.
• Multimeter
• OBD-II scanner
• Screwdriver set
$150 - $400
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regular maintenance checks
• Ensure electrical connections are secure
• Avoid exposure to moisture in engine components
Sensor Issue
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if performance issues are severe.
Check with the vehicle manufacturer for warranty coverage on engine components.
This code has been associated with vehicles using advanced combustion monitoring systems.
Moderate – Should be addressed soon to avoid potential engine damage.
Driving with a malfunctioning Ion Sense Module may increase emissions and affect vehicle safety.
• Engine running
• Battery fully charged
The Ion Sense Module is typically located near the engine block, connected to the ignition system.
Q: Can I drive my car with a P28C0 code?
A: It's best to have it checked soon, as it can affect engine performance.
Q: How do I reset the Check Engine Light after fixing the issue?
A: You can use an OBD-II scanner to reset the light, or it may turn off after a few driving cycles.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
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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.