• Check Engine Light illuminated
• Engine misfire
• Poor fuel economy
• Faulty fuel injector
• Wiring issues such as a short to voltage
• Faulty ECM or injector driver module
ECM: Engine Control Module, the computer that manages engine functions.
Injector: A component that sprays fuel into the engine's cylinders.
• P3135
• P3136
This code means there's a problem with the part that helps spray fuel into the engine for cylinder 9. It's like a hose that's supposed to let water through, but it's letting too much through or is not working right.
The engine control module (ECM) has detected an issue with the electrical circuit that controls the fuel injector for cylinder 9, where the voltage is higher than expected.
The P3134 code indicates that the low side of the high-pressure injector circuit for cylinder 9 is experiencing a higher than normal voltage. This could be due to a short to voltage, an open circuit, or a fault in the injector driver circuit.
• Use a scan tool to verify the code and check for other related codes.
• Inspect the wiring and connectors for the injector circuit for damage or corrosion.
• Test the injector resistance and compare it to the manufacturer's specifications.
• Repair or replace damaged wiring or connectors.
• Replace the faulty fuel injector.
• Replace or reprogram the ECM if necessary.
• OBD-II scan tool
• Multimeter
• Basic hand tools
$200 - $600
Moderate
• BMW 7 Series
• Audi A8
• Mercedes-Benz S-Class
• Regular maintenance and inspection of the fuel system.
• Use high-quality fuel to prevent injector clogging.
• Ensure proper electrical connections and avoid moisture exposure.
Engine Performance
• Do not ignore the Check Engine Light.
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle hard until the issue is resolved.
Injector-related repairs may be covered under the vehicle's powertrain warranty.
This code is often associated with high-performance engines that have more complex fuel injection systems.
Moderate – It should be addressed soon to prevent further engine damage.
Driving with a malfunctioning injector can lead to increased emissions and potential safety issues.
• Engine at operating temperature
• Vehicle in a safe location for testing
The fuel injector for cylinder 9 is located on the engine, typically under the intake manifold.
Q: Can I drive with a P3134 code?
A: It's not recommended as it can lead to engine damage and increased emissions.
Q: How do I know if my injector is faulty?
A: Symptoms include engine misfires, poor fuel economy, and a rough idle.