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 saying that the engine isn't running as smoothly as it should be, because it's not getting enough of something it needs, like fuel.
This code indicates that the engine control module (ECM) has detected that the correction quantity for maintaining engine smoothness is too low.
The P1279 code is set when the Engine Control Module (ECM) detects that the correction quantity for maintaining engine smoothness is below the expected threshold. This can be due to issues with fuel delivery, injector performance, or other factors affecting engine balance and smoothness.
• Rough engine idle
• Poor acceleration
• Increased fuel consumption
• Faulty fuel injectors
• Low fuel pressure
• Air intake system leaks
ECM: Engine Control Module, the computer that controls engine functions.
Fuel Injector: A component that delivers fuel to the engine's combustion chamber.
• Check for any visible leaks in the air intake system.
• Test fuel pressure to ensure it is within specifications.
• Inspect and test the fuel injectors for proper operation.
• Replace faulty fuel injectors.
• Repair or replace any damaged air intake components.
• Adjust or replace fuel pressure regulator if necessary.
• Fuel pressure gauge
• OBD-II scanner
• Multimeter
$200 - $600
Moderate
• BMW 3 Series
• Mercedes-Benz C-Class
• Audi A4
• Regularly service the fuel system.
• Check and replace air filters as needed.
• Use quality fuel to prevent injector clogging.
Engine Performance
• Have the vehicle inspected by a professional mechanic.
• Avoid driving the vehicle until the issue is resolved to prevent further damage.
Check with your vehicle manufacturer or dealer for warranty coverage on engine components.
This code has been associated with issues in vehicles with direct fuel injection systems, particularly in models with higher mileage.
Moderate – Addressing this issue promptly can prevent further engine damage and ensure optimal performance.
Driving with a malfunctioning engine can lead to safety hazards and potential legal issues if emissions are affected.
• Engine at operating temperature
• Vehicle in idle and under load
The fuel injectors and air intake system are located on the engine, typically near the top and sides.
Q: Can I drive with a P1279 code?
A: It's not recommended to drive with this code active, as it can lead to further engine damage.
Q: How can I prevent this code from appearing?
A: Regular maintenance of the fuel and air intake systems can help prevent this code.
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