Oxygen Sensors 1,2 Bank 1,2 Honda Ridgeline 3.5L 2006-2014 Location

Exact Component Location

This video focuses exclusively on showing you the exact, precise locations of all four oxygen ($O_2$) sensors on this vehicle. The first-generation Honda Ridgeline utilizes a transverse-mounted 3.5L V6 engine, which means the cylinders are divided into two banks: Bank 1 is the rear cylinder bank closest to the firewall, and Bank 2 is the front cylinder bank closest to the radiator.

Each bank features an upstream sensor (Sensor 1) and a downstream sensor (Sensor 2):

Bank 1 (Rear / Firewall Side)

• Bank 1, Sensor 1 (Upstream): Located on the rear exhaust manifold assembly before the catalytic converter. Look down behind the engine intake plenum toward the firewall; it is threaded directly into the top of the rear catalytic converter dome.
• Bank 1, Sensor 2 (Downstream): Located further down under the vehicle. Follow the rear exhaust pipe down beneath the firewall area; this sensor is threaded into the side of the rear exhaust pipe immediately after the rear catalytic converter exit.

Bank 2 (Front / Radiator Side)

• Bank 2, Sensor 1 (Upstream): Located at the front of the engine bay. Open the hood and look straight down between the engine block and the radiator fans. It is threaded directly into the top of the front exhaust manifold/catalytic converter casting.
• Bank 2, Sensor 2 (Downstream): Located underneath the front of the vehicle. Look right below the engine oil pan area; it is threaded into the lower portion of the front catalytic converter assembly before the exhaust pipes merge.

How This Video Helps Your DIY Repair

Locating all four sensors quickly is the crucial first step for any successful do-it-yourself exhaust project. By seeing the exact spot and identifying how the radiator fans, firewall insulation, and chassis crossmembers frame each sensor beforehand, you can easily plan your approach. This visual guide helps you choose the right tools—such as a specialized slotted oxygen sensor socket, flex-head ratchets, and long extension bars—saving you valuable time and allowing you to proceed with confidence.

Symptoms of a Faulty Oxygen Sensor

A failing oxygen sensor or a broken heater circuit inside the sensor prevents the engine control module from accurately balancing the air-fuel mixture. Common symptoms include a persistent Check Engine Light (CEL) with diagnostic codes ranging from P0134 to P0161, a heavy drop in fuel economy, a rough or surging engine idle, a failed tailpipe emissions test, or engine hesitation under load because the computer is stuck operating in an inefficient “open-loop” default map.

Safety Measures and Precautions

Before beginning any work on your vehicle, it is essential to prioritize safety. Always wear proper protective gear, including safety glasses and mechanic gloves, to protect your eyes and skin from falling underbody rust flakes, road grime, and sharp heat shields. Because these sensors operate at blistering exhaust temperatures, stay alert, ensure the engine is completely turned off and fully cooled down before touching them to avoid severe burns, and make sure the vehicle is securely supported on heavy-duty jack stands before climbing underneath to access the downstream sensors.

Expert Assistance and Comments

As an experienced mechanic with years of hands-on automotive repair knowledge, I am here to support you. If you have any specific questions about handling frozen or rusted sensor threads, releasing the Honda plastic wiring harness push-pins, or applying copper anti-seize compound to the new threads without contaminating the sensitive sensor tip, feel free to drop a message in the comments below, and I will help you with your car repair.