Randy Worner

My name is Randy Worner. I have been working on cars and trucks for almost 45 years. For the last 38 years, I have taught Automotive / Diesel Technology classes for UTI, Snap-On Tools, Chrysler, Pepboys, Lone Star College, NAPA, and TBC Corporation. I have an Associate’s degree in Business Fundamentals and a certificate in Automotive and Diesel Transportation Technology. I've been working as a writer for OBD Advisor since 2019.

P0741: Torque Converter Clutch Circuit Performance/Stuck Off

By Randy Worner / August 22, 2022

The P0741 code indicates your torque converter clutch circuit is stuck off or malfunctioning. Learn how to identify and repair these causes.

P0740: Torque Converter Clutch Circuit Malfunction

By Randy Worner / August 22, 2022

The P0740 code indicates a malfunction in the torque converter clutch circuit. Learn how to diagnose and fix this serious trouble code.

P0137: O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)

By Randy Worner / August 22, 2022

The P0137 OBD2 code triggers when the voltage of oxygen sensor 2 is too low. Learn how to diagnose and repair this DTC.

P0102 – Mass Air Flow (MAF) Circuit Low Input

By Randy Worner / August 22, 2022

The P0102 code indicates an issue with your MAF sensor. Keep reading to learn how to diagnose and repair the underlying problem.

P0420: Catalyst System Efficiency Below Threshold (Bank 1)

By Randy Worner / August 22, 2022

The P0420 code suggests an underperforming catalytic converter. Learn about this code’s possible causes, likely symptoms, and solutions.