Why does my Mazda 6 throw a p0421 code?
Once the engine and plugs warm up its business as usual. Other ignition related components can cause the code as well (such as plug wires, coils, etc…). If the Oxygen sensors are no longer reading properly, it can throw the P0421 code.
What is the OBDII code for Mazda 6?
P0421 is a generic OBDII trouble code. It has the same meaning for the Mazda 6 as it would any other vehicle. It is closely related to P0420 (which is the most popular OBD code). Warm Up Catalyst Efficiency → Below Threshold (Bank 1)
What does the p0421 code on a catalyst mean?
Warm Up Catalyst Efficiency Below Threshold (Bank 1) What the P0421 code means The P0421 code means that the powertrain control module is noticing that the catalyst system is not performing as it should during warm up conditions. This time period would be from when the vehicle is first started until about five to ten minutes later.
Once the engine and plugs warm up its business as usual. Other ignition related components can cause the code as well (such as plug wires, coils, etc…). If the Oxygen sensors are no longer reading properly, it can throw the P0421 code.
P0421 is a generic OBDII trouble code. It has the same meaning for the Mazda 6 as it would any other vehicle. It is closely related to P0420 (which is the most popular OBD code). Warm Up Catalyst Efficiency → Below Threshold (Bank 1)
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.
Can a bad catalytic converter throw a p0421?
There typically aren’t many symptoms associated with P0421. Here are the most common ones. A bad catalytic converter can throw this code. In fact, if you find this code with no other codes, it is highly likely the Cat or the exhaust system in general is the problem. A visual inspection can be very telling.
There typically aren’t many symptoms associated with P0421. Here are the most common ones. A bad catalytic converter can throw this code. In fact, if you find this code with no other codes, it is highly likely the Cat or the exhaust system in general is the problem. A visual inspection can be very telling.
Why does my Mazda 6 not warm up?
A bad O2 sensor is one of the most common cause of this code. The wiring going to and from oxygen sensors is more susceptible to damage than most other parts of your 6’s wiring harness. This is due to its proximity to hot exhaust, as well as its position under the vehicle.
What is the trouble code for Mazda 626?
I HAVE A MAZDA 626 WITH ONLY 67,OOO MILES. THE CHECK ENGINE LIGHT IS ON AND WHEN I TOOK IT TO AUTO ZONE FOR TROUBLESHOOTING THE CODE WAS P0421. DEFINITION-CATALYST EFFICIENCY LOW-BANK 1. EXPLANATION-THE OXYGEN SENSORS MONITOR THE CATALYTIC CONVERTERS ABILITY TO STORE OXYGEN. PROBLEM CAUSES- 1.
What is the cause of the p0421 code?
Some potential causes of the P0421 code may include: A faulty catalytic converter (most likely cause unless other codes are stored as well) A faulty oxygen sensor. Damaged oxygen sensor circuitry.
Some potential causes of the P0421 code may include: A faulty catalytic converter (most likely cause unless other codes are stored as well) A faulty oxygen sensor. Damaged oxygen sensor circuitry.