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 there's a problem with the electrical circuit that controls the fuel injector for cylinder 7 in the engine. It's like a light switch not working properly, so the fuel injector can't do its job right.
The engine control module (ECM) has detected a low voltage condition in the high-pressure injector circuit for cylinder 7. This can affect the injector's ability to operate correctly.
P3167 indicates that the ECM has found a low voltage condition in the high-pressure side of the injector circuit for cylinder 7. This could be due to issues such as a faulty injector, wiring problems, or a malfunctioning ECM.
• Engine misfire
• Reduced engine performance
• Check Engine Light illuminated
• Faulty fuel injector for cylinder 7
• Damaged or corroded wiring/connectors
• Malfunctioning ECM
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 7's injector.
• Test the injector for proper operation and resistance.
• Repair or replace damaged wiring/connectors.
• Replace the faulty injector.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Ford F-150
• Chevrolet Silverado
• Dodge Ram 1500
• Regularly inspect and maintain fuel system components.
• Use high-quality fuel to prevent injector clogging.
• Perform routine engine diagnostics.
Engine Performance
• Do not ignore the Check Engine Light.
• Seek professional diagnosis if unsure.
• Avoid driving the vehicle if performance is significantly reduced.
Check with the vehicle manufacturer for warranty coverage on engine components.
This code has been associated with injector circuit issues in various models, often linked to wiring problems.
Moderate – Addressing this issue is important to prevent further engine performance problems.
Driving with a malfunctioning injector can lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in a safe and controlled environment
The fuel injector for cylinder 7 is located on the engine block, typically near the intake manifold.
Q: Can I drive with a P3167 code?
A: It's not recommended to drive extensively with this code, as it can lead to further engine issues.
Q: How can I prevent injector circuit problems?
A: Regular maintenance and using quality fuel can help prevent issues with the injector circuit.
High-End · Full-system diagnostics
A full-system bidirectional platform aimed at advanced DIY users and professional diagnostic workflows.
Network faults often require full-system access instead of a generic code reader alone.
View on Amazon
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.
View on Amazon
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.
View on AmazonThese are optional diagnostic tools, not guaranteed fixes. As an Amazon Associate I earn from qualifying purchases.
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.
View options on Amazon
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.