What is Warm Up Catalyst Efficiency Below Threshold Bank 2?
Diagnostic trouble code (DTC) P0431 stands for “Warm Up Catalytic Converter, Bank 2—Efficiency Below Threshold.” It means that your car’s primary computer or powertrain control module has detected that the catalytic converter is not efficient enough based on factory specification.
What is a warm up catalyst?
Table of Contents. Error Code P0431 is defined as Warm Up Catalyst Efficiency Below Threshold (Bank 2). This code refers to a failure in the catalytic converter caused by either too much or too little fuel intake, or contamination from engine oil.
Why does my car have a p0431 trouble code?
The P0431 indicates that the Powertrain Control Module (PCM) has reported an efficiency level below the standard set by the vehicle’s manufacturer relating to the engine’s warm up catalyst. In some cases, this may be a symptom of a general failure in the catalytic converter. The PCM monitors the intake of oxygen into the catalytic converter.
What is the diagnostic code for p0431 warm up catalyst?
P0431 is a diagnostic trouble code (DTC) for “P0431 Warm Up Catalyst Efficiency Below Threshold (Bank 2)”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation.
What does the p0421 code on the Check Engine light mean?
What the P0421 code means. The powertrain control module uses data received from the upstream and downstream oxygen sensors and compares the two readings given. If the two readings are identical, or very close to each other in value, the Check Engine Light will be illuminated and a P0421 code will be stored.
What should I do about Mazda6 p0431 warm up catalyst?
2006 Mazda6 P0431 warm up catalyst below threshold. P0431 warm up catalyst below threshold. What should I do? Check engine light also came on. And it doesn’t drive property.