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 the power supply to the parts of the car that help start the engine and make it run. It's like when a toy doesn't work because the batteries are low.
The P13E8 code indicates that the power supply to the ignition and injector relay circuit is lower than expected, affecting the engine's ability to start and run properly.
The ignition and injector relay is responsible for supplying power to the ignition coils and fuel injectors. When the power supply circuit is low, it can cause misfires or prevent the engine from starting. This issue is detected by the Engine Control Module (ECM) when it senses a voltage drop in the circuit for Bank 1.
• Engine misfires
• Engine won't start
• Check Engine Light is on
• Faulty ignition relay
• Damaged wiring or connectors
• Faulty Engine Control Module (ECM)
ECM: Engine Control Module, the computer that controls engine functions.
Relay: An electrical switch that opens and closes under the control of another electrical circuit.
• Check the ignition relay for proper operation.
• Inspect wiring and connectors for damage or corrosion.
• Test the voltage at the ignition and injector relay circuit.
• Replace faulty ignition relay.
• Repair or replace damaged wiring or connectors.
• Replace the Engine Control Module (ECM) if necessary.
• Multimeter
• OBD-II scanner
• Screwdriver set
$100 - $500
Moderate
• Vehicle 1
• Vehicle 2
• Vehicle 3
• Regularly inspect electrical connections.
• Keep the battery terminals clean.
• Perform routine vehicle maintenance.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if it shows signs of misfiring.
Check with your vehicle manufacturer for warranty coverage on electrical components.
This code has been associated with electrical issues in various vehicle models, often related to aging wiring or relays.
High – This issue can prevent the vehicle from starting or running properly, requiring immediate attention.
Driving with this code may lead to engine performance issues and could be unsafe. It is recommended to address the problem promptly.
• Engine running
• Electrical system active
The ignition and injector relay is typically located in the engine bay fuse box or near the ECM.
Q: Can I drive my car with code P13E8?
A: It's not recommended to drive with this code active, as it may cause engine performance issues or prevent the car from starting.
Q: How do I clear the P13E8 code?
A: After repairs, use an OBD-II scanner to clear the code. If the issue is fixed, the code should not return.
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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.