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How do I fix code 0171?
What repairs can fix the P0171 code?
- Replacing the fuel pump.
- Replacing the fuel filter.
- Replacing the fuel pressure regulator.
- Replacing the powertrain control module.
- Replacing one or more injectors.
- Replacing one or more oxygen sensors.
- Replacing the mass air flow sensor.
- Repairing a vacuum leak.
How do I fix the code P0171 on my Ford?
Remove the mass air flow sensor and clean the sensor using mass air flow cleaner or contact cleaner. Reinstall the mass air flow sensor and clear the check engine light using FIXD. If the check engine light comes back on with code P0171 continue the diagnostic process.
What does System Too Lean Bank 1 and 2 mean?
If you have codes stored in the engine computer for lean bank 1 and 2 is caused by the entire engine is running lean. This is caused by not enough fuel getting into the engine or too much unmetered air getting into the engine and the computer cannot compensate anymore to run it normal.
Can a bad fuel pump cause P0171?
A plugged Fuel Filter or poorly functioning Fuel Pump can set the P0171 code. The computer hears (accurately) from the Oxygen Sensor that the Fuel Mixture is too lean so the computer keeps increasing the amount of fuel being delivered into the combustion chambers.
What causes P0171 and P0174 codes Ford?
COMMON CAUSE: A DIRTY MAF SENSOR One of the most common causes of Ford P0171 and P0174 lean codes is a dirty mass airflow (MAF) sensor. The MAF sensor can also be contaminated by fuel vapors that back up through the intake manifold and throttle body when the engine is shut off.
Can a bad EGR valve cause a P0171 code?
You will find a leak or a faulty one-way valve that is causing the P0171 code in most cases. An EGR valve stuck open can cause the air-fuel mixture to stay lean. If possible, try to check the valve inside it while you open and close it with your diagnostic tool. Clean the MAF sensor.
Can a bad O2 sensor cause a lean code?
A P0171 or P0174 lean code with an O2 sensor reading lean all the time mean — well, several things. The real problem may not be a bad O2 sensor, but possibly be an engine vacuum leak, low fuel pressure or dirty fuel injectors that are causing the engine run lean.
How do I fix code po430?
What repairs can fix the P0430 code?
- Replacing the catalytic converter.
- Diagnosing and repairing the engine misfire.
- Replacing the fuel injector.
- Repairing any mechanical damages in the engine.
- Replacing the oxygen sensor.
- Repairing or replacing the exhaust replaced.
What does the p0171 OBD2 trouble code mean?
P0171 OBD2 Trouble Code: System Too Lean (Bank 1) A P0171 code appears in the engine control unit when the Oxygen sensor on bank 1 recognizes a too lean air-fuel mixture for the sensor to correct it. Several different things could cause this trouble code. Here is what you need to know about the P0171 code.
How do you diagnose a p0171 code on a Ford Ranger?
Reading and analyzing fuel trims and the freeze frame data is the key to properly diagnosing P0171. Use FIXD to scan your vehicle to verify P0171 is the only code present. If other codes are present, they must be addressed first.
What causes a p0171 code on a lean mixture?
There are a number of engine parts or sensors which may cause the trigger of the p0171 code, along with a lean mixture. Aside from simply focusing on p0171, it is also best to look for other sensor-related codes.
How much does it cost to diagnose a p0171 Ford O2 sensor?
If the problem persists, the front oxygen (O2) sensor may need to be replaced. The cost to diagnose the P0171 FORD code is 1.0 hour of labor. The auto repair’s diagnosis time and labor rates vary by location, vehicle’s make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.