P0420 / P0430 Fix for Toyota Tundra & Sequoia V8

Running headers, high-flow cats, or a catless mid-pipe on your Tundra or Sequoia V8 (2UZ-FE or 3UR-FE), or just fighting tired factory cats, and now you've got P0420 or P0430? It's the most common check engine code on modified Toyota V8s, and it's exactly what this part is for.

The Fix: 90° O2 Sensor Spacer

The Brockett Built 90° O2 sensor spacer threads into the downstream O2 bung and moves the sensor out of the direct exhaust stream, so the ECU stops flagging catalyst efficiency. CNC-machined for the M18x1.5 thread, a direct fit for Toyota downstream sensors.

• The Tundra/Sequoia V8 has two banks, so you need two spacers. Grab the 2-Pack V8 Kit and save.
• About a 10-minute install per side. Clear codes and drive a readiness cycle.
• Downstream (rear) sensors only, never the upstream sensor.

Which Engine Do I Have?

• 2000-2009 Tundra / 2001-2009 Sequoia: 4.7L 2UZ-FE V8
• 2010+ Tundra / 2008+ Sequoia: 5.7L 3UR-FE V8

Both use the standard M18x1.5 downstream O2 thread, so the spacer fits either.

FAQ

Do I need one or two?
Both the 2UZ and 3UR are dual-bank V8s. P0420 only means one spacer; P0420 plus P0430 means two. Most guys grab the 2-Pack.

Will it affect performance or fuel economy?
No. The downstream sensor only monitors cat efficiency, it doesn't touch fuel trim, so your tune is unaffected.

Legal note: designed for modified/off-road use. Check local emissions laws.

Get the 90° O2 Sensor Spacer: $42 single / $84 V8 2-Pack →

Machined by Brockett Built in central Illinois. Ships same or next business day. 30-day fitment guarantee.