Buick Rainier Troubleshooting: Shakes When Braking

  If you find your Buick Rainier‘s steering wheel shakes or vibrates when you press the brakes, it is almost always the brake rotors that are the cause of the problem.  There are plenty of other issues that can cause the steering wheel to wobble.  But, if your Rainier is only shaking when braking, that’s … Read more

Buick Rainier White Exhaust Smoke: Causes, Diagnosis, How to Fix

If you own a Buick Rainier, you may have noticed white exhaust smoke coming from your vehicle on occasion. This can be concerning, and it’s essential to understand the possible causes behind this phenomenon to address the issue promptly and efficiently. Several factors can contribute to white smoke emanating from your vehicle’s exhaust pipe, and … Read more

Buick Rainier Troubleshooting:  Squeaky Brakes

  Your Buick Rainier‘s braking system is designed to handle thousands of miles of braking with no intervention from you.  When its brakes begin to squeak, they are telling you that they need some attention. The most typical cause of squeaky brakes are the brake pads themselves, but there are other issues that can cause … Read more

Buick Rainier P0405:  EGR Sensor “A” → Circuit Low

  P0405 is a generic OBDII trouble code.  It deals with the signal coming from the EGR system.  Since it is a generic code, it has the same meaning for the Buick Rainier as it would any other vehicle.   The EGR system allows a certain amount of the Rainier’s exhaust to re-enter the combustion chamber, … Read more

Buick Rainier P0421 Code: Meaning, Causes, How to Fix

P0421 is a relatively rare OBDII trouble code.   It’s generic, which means it has the same definition for the Buick Rainier as it would any other vehicle. It is technically defined as “Warm Up Catalyst Efficiency → Below Threshold (Bank 1)”. In layman’s terms, it indicates that your Buick Rainier’s catalytic converter is not scrubbing pollutants efficiently … Read more

Buick Rainier P0740: Torque Converter Clutch Circuit Malfunction

P0740 is one of the most common transmission trouble codes. It means that the Rainier‘s computer has detected that there is an issue with the torque converter clutch (TCC) solenoid circuit.     P0740: Torque Converter Clutch Circuit Malfunction   The TCC “locks” the drivetrain, which allows for a true mechanical connection between the transmission … Read more

Buick Rainier P0160: O2 Sensor → No Activity Detected B2S2

  P0160 is a standard OBDII trouble code. It has the same meaning for any vehicle with OBDII, including the Buick Rainier. When a vehicle has P0160, 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 … Read more