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 car's computer thinks the fuel injectors on one side of the engine are getting old and not working right, which could make the engine not run smoothly.
The vehicle's engine control module (ECM) monitors the performance of the fuel injectors. If it detects that the adjustments it has made to the fuel delivery over time are outside the expected range, it triggers this code.
The code P119D indicates that the ECM has detected an implausible long-term adaptation value for the fuel injectors on bank 1. This means that the ECM has had to adjust the fuel trim values significantly to compensate for injector aging, which is outside the normal operating parameters.
• Poor engine performance
• Rough idle
• Increased fuel consumption
• Check engine light on
• Engine misfires
• Aging or clogged fuel injectors
• Faulty fuel pressure regulator
• Vacuum leaks
• Faulty oxygen sensor
• ECM software issue
ECM: Engine Control Module
Fuel Trim: Adjustments made by the ECM to the fuel delivery to maintain the optimal air-fuel ratio
• Perform a visual inspection of the fuel injectors and related components.
• Check for vacuum leaks using a smoke machine.
• Test the fuel pressure to ensure it is within specifications.
• Inspect and test the oxygen sensors.
• Use a scan tool to check for additional codes and live data.
• Clean or replace the fuel injectors.
• Repair any vacuum leaks.
• Replace the faulty oxygen sensor.
• Update the ECM software if necessary.
• Replace the fuel pressure regulator if faulty.
• OBD-II scan tool
• Fuel pressure gauge
• Smoke machine
• Multimeter
• Injector cleaning kit
$200 - $800
Moderate
• BMW 3 Series
• Audi A4
• Volkswagen Golf
• Regular maintenance of the fuel system.
• Use high-quality fuel.
• Replace fuel filters as recommended.
Engine Performance
• Have regular maintenance checks.
• Use fuel additives to clean injectors.
• Do not ignore the check engine light.
Check with the vehicle manufacturer for any applicable warranties on the fuel system components.
This code has been more prevalent in vehicles with direct fuel injection systems as they age.
Moderate – Should be addressed soon to prevent further engine performance issues.
Driving with this code may lead to increased emissions and potential engine damage.
• Engine at operating temperature
• Vehicle in closed-loop operation
Fuel injectors are located on the engine's intake manifold, typically near the cylinder head.
Q: Can I drive with a P119D code?
A: It's not recommended to drive for extended periods with this code as it can lead to further engine issues.
Q: How can I prevent this code from appearing?
A: Regular maintenance and using quality fuel can help prevent this issue.
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Fitment Required · Vehicle-fitment part
Relevant when the code or supporting diagnostics point toward upstream or downstream oxygen-sensor faults.
This code family often involves upstream or downstream oxygen-sensor diagnosis.
Verify exact sensor position and vehicle fitment before buying.
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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.