What is P0171 for nissan sentra?
|P0171 NISSAN Description The Diagnostic Trouble Code (DTC) will set when the Fuel Injection system does not operate properly or the amount of mixture ratio compensation is too small. (The mixture ratio is too lean.)
How does the p0171 code work on a car?
The P0171 is one of the more common trouble codes. This code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine’s cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses that reading and adjusts to keep the engine running at that optimum ratio of 14.7:1.
What does p0171 system too lean Bank 1 mean?
P0171 System Too Lean Bank 1 Technical Description. System Too Lean (Bank 1) What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code. It is considered generic because it applies to all makes and models of vehicles (1996-newer), although specific repair steps may be slightly different depending on the model.
What does the Check Engine light mean on a bad crank sensor?
The Check Engine Light. When a crank sensor is in the early stages of failure the vehicle’s computer may turn on the “Check Engine” light. You may not have any other symptoms, but this is the vehicle’s way of telling you that it sees something that is not right.
Where is the knock sensor on a car?
A vehicle knock sensor is a sensor screwed into the engine’s block or cylinder head.
What causes a Nissan Sentra to throw a p0171 code?
The P0171 code on a Nissan Sentra will often be thrown if the fuel injection system is not operating properly. Typically the code will be triggered by a lean condition in the engine. There aren’t usually any drivability issues associated with P0171.
What is the trouble code on a Nissan Sentra?
One of the most common trouble codes with the Nissan Sentra is the P0171 code. This code number references a number that is given to you when you plug your car into a OBDII scanner. It’s not the most complicated OBDII trouble code to diagnose. It is also one of the most common.
What causes the p0171 code to go bad?
Mass Air Flow Sensor – The mass air flow sensor calculates the volume of air entering the engine. If it has gone bad, the air fuel mixture will be off and the P0171 code will show. Bad Fuel Injectors – If you have one or more fuel injectors that have gone bad that can certainly cause the air/fuel mixture to go bad.
What does p0171 mean on Nissan freeze frame?
Reading and analyzing fuel trims and the freeze frame data is the key to properly diagnosing P0171. Use FIXD to scan your Nissan to verify P0171 is the only code present. If other codes are present, they must be addressed first.