Welcome back to Toyota Maintenance YouTube channel! Today we have a 2005 Toyota Sienna in the shop with 190,000 miles on the clock. This model is known for a common issue – the P0420 code, indicating catalyst system efficiency below the threshold on bank one. Let’s dive into this issue and understand what needs to be addressed.
The Sienna is equipped with a V6 engine, the model being 3MZFE, a 3.3-liter V6 engine. Understanding the bank location is important, and in this case, bank one is located at the back, hidden under the hood towards the cabin. This is crucial as the P0420 code specifically relates to bank one, indicating an issue with the catalytic converter.
It’s essential to ensure that the engine is running correctly, the engine air filter is clean, and the MAF and AF sensors are in good condition. Moving to the back of the vehicle, we see the exhaust system. Following the exhaust system, we find the oxygen sensor, past the catalytic converter. This is our work area for addressing the P0420 code.
The catalytic converter and the associated gaskets are crucial parts when resolving the P0420 code. Understanding the specific parts and their locations is vital to avoid working on the wrong area of the vehicle. Here are the part numbers and costs for the components you might need to replace:
- Catalytic Converter (including manifold) – 1714020030, approximately $650 plus tax
- Gasket between the head and catalytic converter – 1717320030, roughly $23 plus tax
- Gasket between the exhaust pipe and the catalytic converter – 9008043036, around $18 plus tax
- Air Fuel Sensor (before the catalytic converter) – 8946708040, approximately $280 plus tax
- O2 Sensor (after the catalytic converter) – 8946508030, around $180 plus tax
So, if you encounter the P0420 code on your 2005 Toyota Sienna, understanding the locations and the necessary parts can help you resolve the issue efficiently. Thank you for watching and stay tuned for more!
What is the meaning of the error code P0420 on a 2005 Toyota Sienna?
The error code P0420 on a 2005 Toyota Sienna indicates that the catalyst system efficiency is below the threshold, specifically on bank one of the engine. This code is commonly associated with the catalytic converter of the vehicle.
Where is bank one located on the 2005 Toyota Sienna’s engine?
In the 2005 Toyota Sienna, bank one is located at the rear of the engine, underneath the heat shield and towards the cabin, opposite of bank two which is located in the front.
What parts are involved in addressing the P0420 error code on the 2005 Toyota Sienna?
To address the P0420 error code on the 2005 Toyota Sienna, the catalytic converter or manifold, the gaskets between the head and the converter, and the gasket between the exhaust pipe and the converter may need to be replaced. Additionally, the air fuel sensor and the O2 sensor may also need to be considered for replacement.
What are the part numbers and costs for the components involved in addressing the P0420 error code on the 2005 Toyota Sienna?
The part number for the catalytic converter (manifold including catalytic converter) is 1714020030, costing roughly $650 plus tax. The gasket between the head and the converter (head gasket) has the part number 1717320030, costing approximately $23 plus tax. The gasket between the exhaust pipe and the converter (doughnut-looking gasket) has the part number 9008043036, costing around $18 plus tax. The air fuel sensor has the part number 8946708040, priced at approximately $280 plus tax. The O2 sensor, which is past the catalytic converter and mounted in the exhaust pipe, has the part number 8946508030, with a cost of about $180 plus tax.