Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
The car's computer is having trouble talking to the special fuel injector for cylinder 5. It's like when a toy's battery is missing or the wires are loose, so it can't work properly.
The code P22E9 indicates that there is an issue with the control circuit for the alternative fuel injector in cylinder 5. This means that the electrical circuit is open or not functioning correctly.
The P22E9 code is triggered when the engine control module (ECM) detects an open circuit or a malfunction in the control circuit of the alternative fuel injector for cylinder 5. This could be due to a broken wire, a faulty connector, or a failed injector.
• Check Engine Light is on
• Engine misfire or rough running
• Reduced fuel efficiency
• Faulty alternative fuel injector
• Open or shorted wiring in the injector circuit
• Poor electrical connection at the injector or ECM
ECM: Engine Control Module
Injector: A device that delivers fuel to the engine's combustion chamber
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for cylinder 5's injector.
• Test the injector for proper operation.
• Repair or replace damaged wiring or connectors.
• Replace the faulty alternative fuel injector.
• Clear the code and test drive to ensure the issue is resolved.
• OBD-II scanner
• Multimeter
• Fuel injector tester
$150 - $400
Moderate
• Chevrolet Silverado
• GMC Sierra
• Ford F-150
• Regularly inspect and maintain fuel system components.
• Ensure proper electrical connections.
• Use quality fuel to prevent injector clogging.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Avoid hard driving until the issue is resolved.
Check with the vehicle manufacturer for warranty coverage on fuel system components.
This code is relatively rare and typically associated with vehicles using alternative fuel systems.
Moderate – Should be addressed soon to prevent further engine performance issues.
Driving with a malfunctioning injector can lead to increased emissions and potential engine damage.
• Engine running
• Vehicle in a safe, stationary position
The alternative fuel injector for cylinder 5 is located on the engine, near the corresponding cylinder.
Q: Can I drive with a P22E9 code?
A: It's not recommended as it can lead to poor engine performance and potential damage.
Q: How do I know if the injector is faulty?
A: A professional diagnosis with specialized tools is needed to test the injector's functionality.
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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.