![]() ![]() If the code changes to P0151 (which indicates low voltage at the B2S1 sensor), it has effectively jumped to the other side, which indicates the Oxygen sensor that is now on bank 2 is bad. Next, clear the codes with a code scanner. They’ll be on or near the end of the exhaust manifolds. If your Trax has a “V” type engine with two cylinder heads, you can swap the bank one and bank 2 O2 sensors. Analyze the freeze frame data to identify possible patterns or trends, which may help you pinpoint the specific issue you need to address. The data includes information like coolant temperature, engine speed, and throttle position at the moment the code was triggered. The freeze frame data captured by your vehicle’s Engine Control Module (ECM) can provide valuable context for the P0131 trouble code’s possible causes. There’s a lot you can do at home to determine the cause of P0131 in the Chevy Trax at home. Failed heater circuit: A failure in the oxygen sensor’s heater circuit can cause the P0131 code to appear.Improperly reading coolant temp sensor: If the coolant temperature sensor is not reading correctly, it can affect the oxygen sensor reading.Open or short circuit: An open or short in the oxygen sensor circuit can cause the P0131 code to appear.Unplugged or damaged wiring: Wiring that has become unplugged or damaged can result in improper reading from the oxygen sensor circuit.Failed Oxygen sensor: A damaged or faulty oxygen sensor can be the primary cause of this code.There are several potential causes for the P0131 code, some of which include: ![]() Hard starting: You may have difficulty starting your vehicle, especially when it’s cold.Poor performance: Your vehicle may exhibit a noticeable lack of power, hesitation during acceleration or overall poor engine performance.Excessive smoke from exhaust: You may notice an increase in smoke coming from your Trax’s exhaust, which is caused by incomplete combustion.High fuel consumption: Your vehicle may consume more fuel than usual due to the inefficient air-fuel mixture.Engine light: The “Check Engine” light or “Service Engine Soon” light will be illuminated on your Trax’s dashboard, indicating an issue with your vehicle.When your vehicle has a P0131 OBD-II code, you may experience some or all of the following symptoms: However, prolonged driving with this issue can lead to rough engine performance, black exhaust smoke, poor fuel economy, and even difficult starting. ![]() When driving your Chevy Trax you may not notice any visible symptoms when encountering a P0131 code, except for the illuminated MIL on your dashboard. “Banks” represent a side of the engine (Bank 1 is the side with the first cylinder, Bank 2 the second cylinder side).
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