2001 Toyota Tundra Code P0420

Joined Feb 12 2002.

2001 toyota tundra code p0420. Leak in exhaust system. For the next person finding this the sensor gasket is available separately from the dealer Toyota part number 86466-20020-83. These are the Most Common Reasons for a P0420 Code.

If you search the GEN1 forum under cats you will find a lot of infos on the subject. Scrape the sensor mounting flange thoroughly removing all traces of scale and of the old gasket and reinstall the old sensor with a new gasket and with M8-125 stainless nuts and lock washers. The Engine Control Module ECM monitors the switching frequency ratio of heated oxygen sensors 1 front O2 sensor and heated oxygen sensors 2 rear O2 sensor.

This code indicates a misreading of Oxygen levels in the down. The code P0420 set due to the Catalyst Efficiency reading being below Normal Bank 1 and in most cases if this is the only code your getting the fix requires replacing the Bank one Catalytic converter. A three way catalyst converter Manifold with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2.

I reset the code and it stayed off for a while. One of the most common trouble codes with all Toyota vehicles is the P0420. It often appears with other codes such as P0420 P0441 or P0440.

Ive driven about 200 miles with no codes no pending codes and no issues reported in mode 6. Check Engine Light is on. Code P0420 indicates that the catalytic converter is not functioning efficiently therefore increasing the output of harmful pollutants by your Toyota.

The O2 sensor still moves up and down when driving but is stable at about 07 volts when at idle. Service Engine Light Often this is the only symptom of the Toyota Solara P0420 code. As the code description implies the P0420 code means that the vehicles control module has detected that the three-way catalytic converter is not working properly is not as efficient as the factory is expecting.