GMC Sonoma P0325 Code: Causes + How to Fix

If your GMC Sonoma is displaying a P0325 trouble code, you may be concerned about what this means and how to fix the issue. This article will discuss the possible causes of this code and how you can address them. With the right information, you can have your GMC Sonoma running smoothly again in no … Read more

GMC Sonoma P0420: Meaning, Causes, + How to Fix

This page is meant to help you troubleshoot the GMC Sonoma P0420 trouble code. It covers the P0420 code’s meaning, symptoms, causes, and possible solutions. P0420 is the most common OBDII code and is virtually never a breakdown risk. A failing oxygen sensor or bad catalytic converter are the most common causes of P0420. Table … Read more

GMC Sonoma P0457: EVAP System – Leak Detected

P0457 is a somewhat common trouble code with the GMC Sonoma. This code references a number that is given to you when you plug your Sonoma into a OBDII scanner. P0457 Indicates that there is a leak in the Evaporative Emission Control (EVAP) System. It is similar to P0455 (large leak) and P0456 (small leak) … Read more

GMC Sonoma Flashing Check Engine Light: Diagnosis

The check engine light indicates that you need to service a vehicle soon. If your GMC Sonoma has a flashing check engine light means that there is a catalyst damaging misfire (it can damage the catalytic converter and O2 sensors). If your truck has a flashing check engine light, it means you need to service … Read more

GMC Sonoma P0122: TPS “A” Circuit Low Input

P0122 is a common trouble code with the GMC Sonoma. It’s an OBDII code that references issues with the Throttle Position Sensor (TPS). It is relatively serious problem since it can leave your vehicle stranded or severely limited.     OBDII code P0122 is a serious problem that requires serious attention. Diagnosing it can be … Read more

P0128 GMC Sonoma: Meaning, Causes, How to Fix

The P0128 OBD II trouble code indicates that your GMC Sonoma’s engine coolant temperature has not reached its required operating temperature within a certain amount of time after starting the truck. This code can appear as soon as you start your vehicle, or it can also occur while driving. It’s essential to address this issue … Read more

GMC Sonoma P0021: OBDII Code Diagnosis

P0021 is a common trouble code. It affects vehicles with variable valve timing (VVT). The list of VVT vehicles is growing, and the GMC Sonoma can have VVT, and is prone to developing this code.     P0021 is a generic OBDII code. This means that it has the same definition regardless of the make … Read more

GMC Sonoma P0741 OBDII Transmission Code Diagnosis

P0741 is a very common OBDII trouble code. It’s know to affect the GMC Sonoma quite often. Here’s what it means: P0741: Torque Converter Clutch Circuit → Performance or Stuck Off The Sonoma uses a clutch in the torque converter to lock the engine and transmission together at highway speed. P0741 can register whenever this … Read more