Misfire– If the air fuel mixture has gotten too far from factory specs, this can cause the Sonic to misfire.Mileage- may or may not suffer depending on how much the air fuel mixture has changed.
Chevy sonic engine diagram code#
Here are the typical symptoms that something is wrong when you have code P0171. For most people the first sign that anything is wrong at all is the service engine soon light coming on. There aren’t usually any drivability issues associated with P0171. Typically the code will be triggered by a lean condition in the engine. The P0171 code on a Chevy Sonic will often be thrown if the fuel injection system is not operating properly. It also throws the code P0171 to let you know that it has done this. The vehicles ECM will add more fuel to the mixture in order to bring the air fuel mixture where it needs to be for optimal combustion. This is commonly referred to as a “lean” condition. The code is thrown when the oxygen sensors detect that there’s not enough oxygen in the exhaust system. Here’s a great YouTube video on finding out what is causing the P0171 code to be thrown on your Sonic. This code number references a number that is given to you when you plug your car into a OBDII scanner. This will allow you to identify which one of the oxygen sensors needs to be replaced.One of the most common trouble codes with the Chevy Sonic is the P0171 code. This will allow you to identify which one of the oxygen sensors needs to be repsensor such as Bank 1 Sensor 1. After you read the fault codes, you will get a code that points to a bad oxygen sensor such as Bank 1 Sensor 1. This guide applies to vehicles such as Spark, Sonic, Bolt, Volt, Cruze, Malibu, Impala, Camaro, Corvette, City Express, Trax, Equinox, Traverse, Tahoe, Suburban, Colorado, Silverado, Sonic, Blazer, Astro, HHR, Uplander, Avalanche, etc.Īll Chevrolet cars have at least two sensors with 6 and 8 cylinder engines having up to four. If you are using a universal oxygen sensor, you will need to use the diagram that came with the sensor to find out which wires to cosensor, you will need to use the diagram that came with the sensor to find out which wires to connect. If you are using a universal oxygen sensor, you will need to use the diagram that came with the sensor to find out which wires to cosensor wire harness by plugging it in. If you are unsure of the correct torque specs, call your local Chevy dealer.Ĭonnect the oxygen sensor wire harness by plugging it in. If you are unsure of the correct torque specs, call your local Chevy dsensor to the recommended torque. Tighten the new Chevrolet oxygen sensor to the recommended torque. If you are unsure of the correct torque specs, call your local Chevy dsensor. This will make it easier to remove the old Chevrolet oxygen sensorsensor. If the sensor cannot be loosened spray penetrating oil and let it sit for at least 10 minutes.
This will make it easier to remove the old Chevrolet oxygen ssensor socket on the sensor and break it loose. Place the oxygen sensor socket on the sensor and break it loose. Use a flat head screwdriver to press the locking tab on the connector before pulling it. Use a flat head screwdriver to press the locking tab on the connector before pullisensor.
Do not touch the sensor or the heat shield until the engine cools down.ĭisconnect the O2 sensor. Press the connector and pull it away to unplug the oxygen sensor. Downstream sensors Bank 1 Sensor 2 and Bank 2 Sensor 2 can be accessed from under the vehicle. Locate the oxygen sensor on the exhaust mani sensor on the exhaust manifold. Remove the negative clamp from the battery. Pull the hood release under the dashboard on the driver's side.ĭisconnect the negative battery terminal. Park the Chevrolet on level ground and set the parking brakes.