Code P0420?

2009 NISSAN MURANO
214,000 MILES • 3.5L • V6 • 4WD • AUTOMATIC
Avatar
LIONELL8732
  • MEMBER
  • 150 POSTS
i want to no where is the three-way catalytic converter bank 1 located, so i can replace it. getting code P0420. The car runs fine. i just know it is time to replace the cat. just need a diagram and which one since the car has two cats.
Jan 6, 2025 at 12:12 PM
Avatar
STEVE W.
  • ✓Experienced Mechanic
  • 15,370 POSTS
P0420 is the bank one converter. The bank one is on the side with number one cylinder. On the 3.5 that is the right side of the engine or facing the firewall in the case of the Murano. To remove it you remove the O2 sensor then the lower bolts that hold the exhaust pipe in place. Now you remove the two bolts that go up through the cat into the manifold. Then the two nuts that are on the rear studs. Those can be a bear to access, you can remove the cowl extension to gain access. To install you reverse the process.
Images (Click to enlarge)
Attached Media
Attached Media
Attached Media
Attached Media
Jan 6, 2025 at 12:55 PM
🔧 Tools & Auto Repair Parts
Find automotive tools, diagnostic equipment, and replacement parts for your next repair.
Shop on Amazon →
Paid affiliate link. As an Amazon Associate, we earn from qualifying purchases.
Add a reply
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.

Ask a new question

Frequently Asked Problems for This Vehicle