- 2006MERCURYGRAND MARQUIS4.6L ENGGS AIR DOC HOW TO
- 2006MERCURYGRAND MARQUIS4.6L ENGGS AIR DOC CRACKED
- 2006MERCURYGRAND MARQUIS4.6L ENGGS AIR DOC CODE
The P0171 code is thrown when the bank one sensor one O2 sensor reports that your Grand Marquis’s engine is running lean.
2006MERCURYGRAND MARQUIS4.6L ENGGS AIR DOC HOW TO
The linked YouTube video is a phenomenal resource on how to find a vacuum leak.
2006MERCURYGRAND MARQUIS4.6L ENGGS AIR DOC CRACKED
Verify that they aren’t cracked and that they are tightly secured. Look at any hoses or sensors that connect to the intake manifold. Listen and look around your Mercury Grand Marquis’s engine bay to see if you can find the vacuum leak. One of the most common causes for the P0171 code to show is a vacuum leak. If there is an air leak after the MAF sensor, it’s not being measured as it enters the intake, which increases the air in the air-to-fuel ratio. Your Grand Marquis’s MAF and/or MAP sensors meter the air as it enters the engine. With that in mind, here are the most common causes: Vacuum Leaks The P0171 code is thrown when something has caused there to be too much air or not enough fuel.
Idle Issues– With the air/fuel mixture altered, the vehicle can idle erratically as the computer compensates to keep the engine running. Misfire– If the air-fuel mixture has gotten too far from the 14.7:1 sweet spot, this can cause your Mercury Grand Marquis to misfire. Mileage- may or may not suffer depending on how much the air-fuel mixture has changed. For most people, the first sign that anything is wrong is the check engine light. There aren’t usually any drivability issues associated with P0171. If your car has an inline four or six, there’s only one bank of cylinders. You only need to concern yourself with this if there are two cylinder heads. Bank 1īank 1 is the side of your Mercury Grand Marquis’s engine with the first cylinder. It also throws the code P0171 to let you know it has done this. The vehicle’s PCM will add more fuel to the mixture to bring the air-fuel mixture where it needs to be for optimal combustion. The code is thrown when the oxygen sensors detect the air-fuel mixture is “lean” (too much air or not enough fuel). Powertrain control module– Takes info from these sensors and uses it to adjust the air/fuel ratio. Their job is to meter the air as it enters the engine. MAF or MAP sensor– Depending on your Grand Marquis’s model year, it can have a mass airflow sensor or manifold absolute pressure sensor (or both). O2 sensors– Oxygen sensors meter the exhaust and report the oxygen content to the powertrain control module. Your car’s fuel trim system manages the air/fuel ratio and adjusts it when the powertrain control module determines it’s necessary (it can range anywhere from 12.0:1 for power and 16.0:1 for economy). The ideal air/fuel ratio is 14.7:1 (14.7 parts air to one part fuel). P0171 is a generic code, meaning it has the same definition for the Mercury Grand Marquis as any other vehicle. P0171 Definition: Fuel Trim System Lean Bank 1 The common P0171 repairs are usually simple. It varies, but the most common repairs are usually under $200. Rarely, but driving with P0171 can sometimes damage other components. DefinitionĬheck engine light, decreased fuel economy, misfire, hard to find idle.ĭirty MAF sensor, vacuum leak, O2 sensor. The most common causes of P0171 are a bad Oxygen sensor, a vacuum leak, or a dirty MAF sensor. It’s not the most complicated OBDII trouble code to diagnose. It’s the most common air/fuel mixture-related code. It indicates that your Mercury Grand Marquis is running lean on the bank one side. Lynol Truck Parts > Automotive A/C Condenser > AC3557 - AC Condensers - 06-11 Ford Crown Victoria V8 4.6L 06-11 Lincoln Town Car V8 4.6L 06-08 Mercury Grand Marquis V8 4.One of the most common trouble codes with the Mercury Grand Marquis is P0171.
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