What causes code P0171?
What causes code 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.
How serious is P0171?
How serious is the P0171 code? The P0171 code is a serious issue. If a vehicle has this code stored in its powertrain control module, the engine of that vehicle simply will not run well. If the engine does not maintain proper air/fuel ratio, there will be a major waste of fuel and a lack of power while driving.
Is it safe to drive with a code p0171?
How safe is it to still drive the car with code P0171? Code P0171 should be repaired without delay, since driveability can be seriously affected. This poses an obvious safety risk , and especially when driving in traffic when a sudden and unexpected loss of power can cause accidents and crashes.
How can I fix code p0171?
To fix the P0171 code, you need to check and repair vacuum leaks, repair low fuel pressure, or replace any faulty sensor that can cause a lean mixture on bank 1. What causes P0171 code? The most common causes of the P0171 code are vacuum or intake leaks, low fuel pressure, faulty PCV valve, or a faulty MAF sensor.
What are the causes a p0171 code?
Causes of the P0171 code may include: A faulty fuel pressure regulator. A weak fuel pump. A clogged fuel filter. A faulty powertrain control module. A vacuum leak. Faulty injector(s) Faulty oxygen sensor(s)
What causes trouble code p0172?
A Thermostat stuck in the open position can mechanically cause a code P0172, especially in cold climates. The engine won’t warm up, preventing it from going into “closed loop” fuel control. Ignition misfires, like mechanical misfires, cause puffs of oxygen to keep hitting the Oxygen Sensors.