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 has detected a problem with the electrical circuit that helps measure how well the engine is burning fuel. It's like a sensor that isn't working right, and the car's computer noticed it.
The P1393 code indicates a low voltage condition in the ionic current voltage selection circuit, which is part of the system that monitors combustion quality in the engine.
The ionic current voltage selection circuit is responsible for detecting the ionization current within the combustion chamber. This current is used to monitor the combustion process and ensure optimal engine performance. A low voltage in this circuit suggests an issue with the circuit's ability to accurately measure or report the ionization levels.
• Check Engine Light (CEL) is on
• Poor engine performance
• Increased fuel consumption
• Faulty ionic current sensor
• Damaged wiring or connectors in the circuit
• Faulty Engine Control Module (ECM)
Ionic Current: An electrical current generated by the ionization of air/fuel mixture in the combustion chamber.
ECM: Engine Control Module, the computer that controls engine functions.
• Use an OBD-II scanner to confirm the P1393 code.
• Inspect the wiring and connectors related to the ionic current sensor for damage or corrosion.
• Test the ionic current sensor for proper operation.
• Repair or replace damaged wiring/connectors.
• Replace the ionic current sensor if faulty.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$100 - $500
Moderate
• Chrysler Sebring
• Dodge Stratus
• Jeep Grand Cherokee
• Regular maintenance checks
• Keep engine components clean and free of corrosion
• Ensure proper electrical connections
Sensor Issue
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle for long distances until the issue is resolved.
Check with the vehicle manufacturer for specific warranty coverage on engine sensors.
The P1393 code has been associated with certain Chrysler and Dodge models, particularly from the early 2000s.
Moderate – It's important to address this issue to prevent further engine performance problems.
Driving with a malfunctioning sensor can lead to increased emissions and may not comply with local emissions regulations.
• Engine at operating temperature
• Vehicle in park or neutral
The ionic current sensor is typically located near the ignition coils or spark plugs.
Q: What happens if I ignore the P1393 code?
A: Ignoring the P1393 code can lead to poor engine performance and increased fuel consumption.
Q: Can I drive my car with a P1393 code?
A: It's possible to drive short distances, but it's recommended to have the issue fixed to avoid further problems.
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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.