Rick's Free Auto Repair Advice

Posts Tagged: obdII

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

P2135 Code — What it means, how to fix

Learn what a P2135 code means and how to diagnose and fix the problem A P2135 code is defined as Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation. A throttle position sensor tells the ECM exactly how far to open or close the throttle plate. This code is used almost exclusively in engines equipped with an electronic throttle body and an electronic accelerator pedal (gas pedal). In these “drive by wire” systems, the ECM receives input from the accelerator pedal and transmits the commands to the electronic throttle body. Both the accelerator … Read More


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