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 is a problem with the fuel injector for cylinder 10 in the engine. It's like a broken wire or connection that is causing the injector to not work properly.
The engine control module (ECM) has detected a short circuit in the high side of the fuel injector circuit for cylinder 10.
The P31BA code indicates that the high side of the fuel injector circuit for cylinder 10 is shorted to the ignition coil circuit. This can cause improper injector operation and affect engine performance.
• Engine misfire
• Poor fuel economy
• Check engine light on
• Damaged wiring harness
• Faulty fuel injector
• Short circuit between injector and coil
ECM: Engine Control Module
Injector: A device that sprays fuel into the engine's cylinders
• Inspect the wiring harness for damage.
• Check the injector and coil connections.
• Test the injector with a multimeter.
• Repair or replace damaged wiring.
• Replace faulty fuel injector.
• Ensure proper connections between components.
• Multimeter
• OBD-II scanner
• Basic hand tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram 1500
• Regular maintenance checks
• Inspect wiring for wear
• Use quality fuel
Engine Performance
• Do not ignore the check engine light.
• Seek professional diagnosis if unsure.
• Avoid driving the vehicle if misfiring occurs.
Check with your vehicle manufacturer for warranty coverage on fuel injectors.
This code has been associated with issues in vehicles with complex injector systems, often due to wiring problems.
High – Continued driving can lead to further engine damage.
Ignoring this issue can lead to increased emissions and potential damage to the catalytic converter.
• Engine running
• Warm engine temperature
The fuel injector for cylinder 10 is located on the engine block, typically near the intake manifold.
Q: Can I drive my car with this code?
A: It's not recommended as it can cause further engine damage.
Q: How do I know if my injector is faulty?
A: Symptoms include engine misfires and poor fuel economy.
High-End · Full-system diagnostics
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Network faults often require full-system access instead of a generic code reader alone.
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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.