Buick Encore P0505: Idle Air Control System- Malfunction

P0505 is an OBDII code that deals with the idle air control system in the Buick Encore.  It’s a generic code, which means that it has the same meaning for the Encore as it would any other vehicle (Encore or not). P0505:  Idle Air Control System:  Malfunction When P0505 is triggered, it is typically caused … Read more

Buick Encore P0139: O2 Sensor Slow Response (Bank 1 -Sensor 2)

P0139 is a common OBDII code that occurs in many vehicles, including the Buick Encore. The code is triggered when there is an issue with the response time from the oxygen (O2) sensor when switching voltage levels. The Oxygen sensors are responsible for helping the ECM meter oxygen levels in the exhaust, and helping to … Read more

Buick Encore P0140: O2 Sensor → No Activity Detected B1S2

P0140 is a generic OBDII trouble code. It has the same meaning for any vehicle with OBDII, including the Buick Encore. It means that the PCM/ECM is not detecting any activity from the sensor.  It doesn’t mean that the O2 sensor isn’t getting power, but that the voltage isn’t changing, which is the “no activity”. … Read more

Buick Encore P0151 Code: Meaning, Causes, How to Fix

The P0151 code is an OBD-II diagnostic trouble code that indicates low voltage in the Buick Encore’s Oxygen (O2) sensor circuit located at Bank 2, Sensor 1 (B2S1). The B2S1 O2 sensor plays a crucial role in maintaining optimal engine performance by detecting the air-fuel ratio in the exhaust, then sending this data to the … Read more