How do you fix code P0171?
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.
Is it OK to drive with P0171 code?
It is okay to drive a vehicle with P0171 for a short period of time, but driving with this code for an extended period of time can overheat the engine and cause internal engine damage.
What causes engine code P0171?
This can be caused by something like a disconnected hose or vacuum leak, which means there’s more air than usual, or because your fuel system is weak. P0171 is a common trouble code in many vehicles. … If there is too much air, the ECM or PCM overcompensates with larger fuel injections, which triggers the P0171 code.
How much does it cost to fix P0171?
What is the cost to resolve a P0171 code? This code will require a diagnostic check, which will run about $100 depending on the time it takes to find the issue. As there is a laundry list of reasons why the engine runs lean, the average price per repair will vary greatly.
Can bad fuel injectors cause P0171 code?
A leak that causes diagnostic trouble code P0171 could be anywhere around the engine intake, including the PCV hoses, vacuum hoses, and the intake manifold gasket. … A weak or failing fuel pump won’t push enough gasoline to the engine. Clogged fuel injectors or a dirty fuel filter will cause a similar backup.
Can a bad air filter cause P0171?
If the filter is clogged or excessively dirty, this is enough to impede or restrict the air flow, hence resulting in a lean running condition. Besides a dirty air filter, the P0171 code can also be blamed on a dirty or faulty MAF sensor and a clogged fuel filter.
Where is the MAF sensor located?
MAF sensors are located between the air filter and the throttle body and are responsible for measuring the amount of air entering the engine. Most vehicles have a hot wire MAF sensor.
Can a bad O2 sensor cause a P0171 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.
What side of the engine is Bank 1?
Bank 1 and bank 2 simply refer to either side of the engine. Bank 1 is on the side with cylinder 1. Bank 2 is the side with cylinder 2. Most commonly Bank 1 is towards the front of the car if it has a transverse engine.
How do I reset my mass airflow sensor?
Check if the engine light is still on after the Mass Air Flow Sensor was replaced. The entire system can be reset by unhooking the battery and leaving it unhooked for 10 minutes. Keeping the battery unhooked for longer than 10 minutes won’t hurt anything.
How do you check a mass air flow sensor on a Ford?
How do I know if my mass air flow sensor is bad?
Symptoms of a Faulty Mass Air Flow Sensor
- The engine is very hard to start or turn over.
- The engine stalls shortly after starting.
- The engine hesitates or drags while under load or idle.
- Hesitation and jerking during acceleration.
- The engine hiccups.
- Excessively rich or lean idling.
Do you have to reset after changing MAF sensor?
After Installation of the new MAF:
Usually the motor recognizes the new part and everything is ok. … But if the motor continues to have problems, run the engine idle for 20-30 minutes. 2. You can reset the ECU by disconnecting the battery for 10 min.
Do I need to disconnect battery when changing MAF?
The original mass air flow sensor needs to be removed. The battery needs to be disconnected from the ground cable. … Accidental starting and injury are prevented by this.
Should I disconnect battery when changing MAF sensor?
a. Disconnect the ground cable from the battery. This prevents accidental starting and possible injury during MAF sensor installation. This also disables electric cooling fans that may come on even after the ignition has been turned off and the key removed.