WebJan 24, 2024 · How to Read Your Toyota Corolla Check Engine Light To read the diagnostic trouble code stored by your car’s computer, you have a few options. 1) Go to your local mechanic. As part of their diagnostic fee, they will use a professional OBD2 scan tool to read the code and identify the cause. WebJan 27, 2024 · OBD II fault code P0171 is a generic trouble code that is defined as “System too lean – Bank 1” and is set when the PCM (Powertrain Control Module) detects an air/fuel mixture that is too lean on bank 1. Note that in the context of this code, “system” refers to faults in the air/fuel metering system that cause, or contribute to an ...
P0171 Code (Symptoms, Causes, and How to Fix)
WebJun 6, 2024 · A P0171 code indicates the air-fuel ratio entering your engine block is not ideal. Two main issues typically cause this code. There is either too much air or not enough fuel in the lines to create the right ratio. When there’s too much air, you’ll often find a vacuum leak allowing an excess of oxygen into the line. WebTroubleshooting P0171 Code Oftentimes, a P0171 means that your Toyota is having trouble with a dirty or faulty mass airflow (MAF) sensor, or a vacuum leak downstream of the MAF sensor (perhaps in the PCV line or in the valve itself). Of course, this code can also signify a bad O2 sensor in bank 1. dishwasher good tines
P0171 Chevrolet Code - Fuel Trim System Lean Bank 1 - Engine-Codes.com
WebFeb 11, 2024 · The P0171 code indicates that the fuel system in part of the engine is running weak or there is a vacuum leak near that side of the engine. This happens when … WebA P0171 check engine light code is set when the computer has reached a rich calibration limit and can not add enough fuel to maintain the correct mixture. Possible Causes: Refer to our Oxygen Sensor Code Diagnosis article for a list of all possible causes. The following is an overview of P0171 check engine light code possible causes. WebWhen a vehicle has the fault code P0171, it means that computer can no longer automatically adjust the mixture between air and fuel. Code P0171 applies to 4-cylinder engines (Bank 1) as they generally have only one bank. If you have a V6 or V8 engine you can also get a P0174 code which refers to Bank 2. When the code says that the fuel … covington and campbell wilmington nc