What is a P1129 code?
P1129 – OBD-II Trouble Code: Closed Loop Fueling Not Achieved Bank 2. P1129 is common to see when there is any trouble related to the oxygen sensor. Closed loop means the engine has sufficiently warmed up and fuel delivery is now being adjusted by input from the oxygen sensor(s).
Where is the map sensor on a 2002 Honda Civic?
Dicksen Mah , The MAP sensor on the Honda 1.7 engine is stuck in the intake manifold right beside the throttle body(driver side) held by 1 bolt. Remove plastic filter air ducting from above throttle body.
What does closed loop fueling not achieved mean?
25 years of experience. Code p1128 refers to “Closed loop fueling not achieved”, meaning that for some reason the engine is not reaching a state where it is able to run using the information from the engine sensors.
Can you clean a MAP sensor?
Use an electric parts cleaner on a soft rag or paper towel to clean the outside of the MAP sensor. Spray the electric parts cleaner into the sensor port — a couple of spritzes are usually sufficient. Shake out the excess and let the MAP sensor dry.
What causes P1128?
The meter we plugged in came up with code P1128. My car has an automatic transmission. Code p1128 refers to “Closed loop fueling not achieved”, meaning that for some reason the engine is not reaching a state where it is able to run using the information from the engine sensors.
What causes open loop fault?
And finally, there’s “open loop fault,” generated for lean or rich codes. The processor thinks that there is an issue with both upstream oxygen sensors. The system will respond by going into open loop and providing no fuel trim correction.
How can you tell if a MAP sensor is bad?
What to look out for in a failing MAP sensor
- Rich air-fuel ratio: Look for rough idle, poor fuel economy, slow acceleration and a strong smell of gasoline (especially at idle)
- Lean air-fuel ratio: Look for surging, stalling, lack of power, hesitation on acceleration, backfiring through the intake, and overheating.
What is closed loop fueling?
In closed loop mode, the ECU will use the input from the lambda sensor in the exhaust to determine the correct amount of fuel to inject to the engine. This way the ECU is able to adjust the air/fuel ratio based on the actual result of the combustion.