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 computer in your car has detected a problem with the injector for cylinder number 12. It's like when a water hose is blocked and can't spray water properly.
The engine control module (ECM) monitors the injector circuit for each cylinder. If it detects a low voltage or resistance in the injector circuit for cylinder 12, it triggers the P0294 code.
The P0294 code indicates that the ECM has detected a lower than expected voltage or resistance in the injector circuit for cylinder 12. This can be due to wiring issues, a faulty injector, or a problem with the ECM itself.
• Engine misfire
• Poor fuel economy
• Check Engine Light illuminated
• Faulty fuel injector for cylinder 12
• Wiring issues such as an open or short circuit in the injector circuit
• Faulty ECM (Engine Control Module)
ECM: Engine Control Module, the computer that controls engine functions.
Injector: A component that sprays fuel into the engine's cylinders.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connectors for cylinder 12's injector.
• Test the injector's resistance and voltage.
• Repair or replace damaged wiring or connectors.
• Replace the faulty injector.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• BMW 7 Series
• Mercedes-Benz S-Class
• Audi A8
• Regularly inspect and maintain the fuel injector system.
• Use high-quality fuel to prevent clogging.
• Perform routine engine diagnostics.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle if it shows severe symptoms.
Check with your vehicle manufacturer; injectors may be covered under powertrain warranty.
Injector circuit issues have been a common problem in high-mileage vehicles, often due to wear and tear.
Moderate – Addressing this issue promptly can prevent further engine damage.
Driving with a misfiring engine can lead to increased emissions and potential safety hazards.
• Engine at operating temperature
• Vehicle in a safe location for testing
The fuel injector for cylinder 12 is located on the engine block, typically under the intake manifold.
Q: Can I drive with a P0294 code?
A: It's not recommended, as it can cause engine damage and increased emissions.
Q: How do I know if the injector is faulty?
A: A multimeter can be used to test the injector's resistance and voltage.
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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.