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 car's system that helps detect if the engine is running smoothly. It's like a sensor that checks if everything is okay, but it's not working right now.
The P1395 code indicates an issue with the ionic current sensing circuit, which is used to monitor combustion quality in the engine cylinders.
The P1395 code is triggered when the Engine Control Module (ECM) detects an open circuit in the ionic current voltage selection. This system is part of the engine's misfire detection system, which uses ionic current sensing to determine the combustion quality in each cylinder. An open circuit means there is a break in the electrical path, preventing the system from functioning correctly.
• Check Engine Light is on
• Poor engine performance
• Increased fuel consumption
• Faulty ignition coil
• Damaged wiring or connectors
• Faulty Engine Control Module (ECM)
Ionic Current: An electrical current used to detect combustion quality in engine cylinders.
ECM: Engine Control Module, the computer that manages engine functions.
• Use an OBD-II scanner to confirm the code.
• Inspect the ignition coils and wiring for damage.
• Check the connectors for corrosion or loose connections.
• Replace faulty ignition coil.
• Repair or replace damaged wiring or connectors.
• Replace the Engine Control Module if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $500
Moderate
• Ford Focus
• Mazda 3
• Volvo S40
• Regular maintenance of ignition system components.
• Ensure wiring and connectors are in good condition.
• Use high-quality fuel to prevent misfires.
Sensor Issue
• Do not ignore the Check Engine Light.
• 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 ignition system components.
This code has been associated with vehicles using advanced misfire detection systems, particularly those using ionic current sensing technology.
Moderate – While the vehicle may still be drivable, it is important to address this issue to prevent further engine damage.
Ignoring this code can lead to increased emissions and potential engine damage, which may not comply with emissions regulations.
• Engine running
• Warm engine conditions
The ionic current sensing circuit is typically located within the ignition coil or near the spark plugs.
Q: Can I drive with a P1395 code?
A: It's not recommended to drive for long periods with this code, as it can lead to engine performance issues.
Q: How is the ionic current used in the engine?
A: The ionic current is used to detect combustion quality and misfires in the engine cylinders.
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Universal · Digital multimeter
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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.