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 there's a problem with a part of the car's computer system that helps control how the engine runs. It's like when your game console has a glitch and doesn't work right.
The P1398 code indicates an issue with the Ionic Current Control Module, which is responsible for monitoring and controlling the ignition process in the engine.
The P1398 code is triggered when the Engine Control Module (ECM) detects a malfunction in the Ionic Current Control Module for Bank 1. This module is part of the ignition system and helps in detecting misfires by monitoring the ionic current in the combustion chamber.
• Engine misfires
• Poor engine performance
• Check Engine Light illuminated
• Faulty Ionic Current Control Module
• Wiring issues or poor connections
• Faulty ECM
ECM: Engine Control Module
Ionic Current: An electrical current used to detect combustion quality in the engine
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the Ionic Current Control Module.
• Test the Ionic Current Control Module for proper operation.
• Repair or replace any damaged wiring or connections.
• Replace the Ionic Current Control Module if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• Honda Accord
• Honda Civic
• Acura TL
• Regular maintenance checks
• Ensure proper engine tuning
• Use high-quality fuel
Engine Performance
• Have the vehicle inspected by a professional mechanic.
• Avoid driving long distances until the issue is resolved.
Check with your vehicle manufacturer or dealership for warranty coverage on the ECM and related components.
The P1398 code has been commonly reported in Honda and Acura vehicles, often related to ignition system issues.
Moderate – While the vehicle may still be drivable, it is recommended to address this issue promptly to avoid further engine damage.
Driving with a malfunctioning ignition system can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in park or neutral
The Ionic Current Control Module is typically located near the ignition coils on the engine.
Q: Can I drive my car with a P1398 code?
A: It's possible to drive short distances, but it's best to get it checked out soon to prevent further issues.
Q: Will a P1398 code cause my car to fail emissions tests?
A: Yes, a malfunctioning ignition system can lead to increased emissions, which may cause your car to fail emissions tests.
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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.