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 understanding information from the fuel injector in cylinder 5, which helps the engine run smoothly.
This code indicates that the data being received from the injector on cylinder 5 is not what the engine control module (ECM) expects, possibly due to a communication error or a mismatch.
The P2690 code is triggered when the ECM detects that the data from the cylinder 5 fuel injector is incompatible with the expected parameters. This can be due to incorrect injector calibration, faulty wiring, or a malfunctioning injector.
• Check Engine Light is on
• Engine misfire
• Reduced engine performance
• Faulty fuel injector
• Wiring issues or poor connections
• ECM software issue or malfunction
ECM: Engine Control Module, the computer that controls engine functions.
Injector: A device that sprays fuel into the engine's cylinders.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for cylinder 5 injector.
• Test the injector for proper operation.
• Repair or replace faulty wiring or connectors.
• Reprogram or update the ECM software.
• Replace the cylinder 5 fuel injector if necessary.
• OBD-II scanner
• Multimeter
• Fuel injector tester
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram
• Regular maintenance and inspection of fuel injectors.
• Ensure ECM software is up to date.
• Check wiring and connectors regularly for damage.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional if you experience engine misfires.
Repairs may be covered under the vehicle's powertrain warranty. Check with your manufacturer.
This code has been associated with injector communication issues in vehicles with advanced fuel systems.
Moderate – Addressing this issue can prevent further engine damage and maintain performance.
Driving with a misfiring engine can lead to increased emissions and potential safety hazards.
• Engine running
• Vehicle at operating temperature
The fuel injector for cylinder 5 is located on the engine, typically on the side of the cylinder head.
Q: Can I drive with a P2690 code?
A: It's not recommended to drive for extended periods with this code as it can lead to engine damage.
Q: Will a P2690 code cause my car to fail emissions tests?
A: Yes, a misfire or injector issue can cause increased emissions, leading to a failed test.
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Universal · Digital multimeter
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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.