p0420 code

P0420 Code Catalytic Converter Efficiency Below Threshold – Fixes & Solutions

What Does the P0420 Code Mean? The P0420 code stands for: “Catalyst System Efficiency Below Threshold (Bank 1).” This means that the catalyst system efficiency is below the expected threshold, typically indicating that the converter is not functioning properly. The engine control unit (ECU) monitors the oxygen sensors before and after the catalytic converter. If…

p2121 code

P2121 Code Throttle Pedal Position Sensor Symptoms Causes How to Fix

P2121 Code Throttle Pedal Position Sensor Issues If you love cars or enjoy fixing them yourself, you may come across the P2121 engine code. This code indicates an issue with the Throttle/Pedal Position Sensor/Switch “D” Circuit Range/Performance. Understanding the code, its causes, symptoms, and solutions can help you save time and money. This knowledge will also help…