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 one of the parts that helps the engine start. It's like when a toy's battery is too low to make it work.
The P2315 code is triggered when the Powertrain Control Module (PCM) detects a low voltage condition in the ignition coil 'F' primary control circuit.
The ignition coil is responsible for converting the battery's low voltage to the thousands of volts needed to create an electric spark in the spark plugs to ignite the fuel. The 'F' designation typically refers to a specific coil in a multi-coil system. A low voltage condition indicates that the coil is not receiving the proper amount of electrical current, which can lead to misfires and poor engine performance.
• Check Engine Light is on
• Engine misfires
• Poor fuel economy
• Faulty ignition coil
• Wiring issues such as damaged or corroded wires
• Faulty PCM (Powertrain Control Module)
PCM: Powertrain Control Module, the computer that controls engine and transmission functions.
Misfire: A failure of the engine to ignite the air/fuel mixture in the cylinder.
• Use an OBD-II scanner to confirm the code.
• Inspect the ignition coil and its wiring for damage.
• Test the voltage at the ignition coil connector.
• Replace the faulty ignition coil.
• Repair or replace damaged wiring.
• Reprogram or replace the PCM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools (screwdriver, pliers)
$100 - $300
Moderate
• Ford F-150
• Chevrolet Silverado
• Toyota Camry
• Regular maintenance and inspection of ignition components.
• Keep electrical connections clean and secure.
• Use high-quality ignition coils.
Engine Performance
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
• Consult with a professional mechanic for accurate diagnosis and repair.
Check with the vehicle manufacturer for warranty coverage on ignition components.
This code has been associated with ignition coil issues in vehicles with coil-on-plug systems.
Moderate – It's advisable to address this issue soon to avoid engine performance problems.
Ignoring this code may lead to increased emissions and potential engine damage.
• Engine running
• Warm engine temperature
The ignition coil is typically located on top of the engine, attached to the engine block or cylinder head.
Q: Can I drive with a P2315 code?
A: It's not recommended to drive with this code active as it can lead to engine misfires and potential damage.
Q: How do I know if my ignition coil is bad?
A: Symptoms of a bad ignition coil include engine misfires, poor fuel economy, and a check engine light.
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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.