Posts Tagged: trouble code
P0138 Code — What it means and how to fix it
Learn what a P0138 code means, the most common causes, and the diagnostic procedure A P0138 Code is a generic trouble code defined as an O2 Sensor Circuit High Voltage (Bank 1 Sensor 2). Bank 1 is the part of the engine that houses cylinder number one. Sensor 2 is located after the catalytic converter. The sensor is used to check the oxygen storage capacity of the converter. The P0138 code means the Engine Control Module (ECM) has detected a high voltage signal (over 999 mV) from the downstream sensor … Read More
P0137
Fix code P0137 Oxygen Sensor Circuit Low Voltage (Bank 1 Sensor 1). This sensor is located on the engine bank that houses #1 cylinder and is located AFTER the catalytic converter The PCM sends a reference voltage (usually 5-volts) to the variable resistor in the oxygen sensor and looks for a return voltage. Once the sensor is heated up, the PCM expects to see a varying voltage. If the PCM sees a constant low voltage, it will set a trouble code P0137. Most common causes are: vacuum leak that’s allowing … Read More
P0174 code — The most likely causes and fixes
Learn what a P0174 code means and the most likely causes The definition of a P0174 code is System Too Lean (Bank 2). Bank 2 is the bank of cylinder that does NOT contain cylinder #1. In this case, the oxygen sensor upstream from the catalytic converter is sensing a lean condition. Here’s a list of the most common causes of a lean condition In simple terms, it’s caused by too little fuel or too much air. Here The following are some of the most common causes of this P0174 … Read More