P0420 / P0430 Fix for Toyota Tacoma

Tacomas run forever — their cats don't. Whether you've got a 2nd/3rd gen 1GR-FE V6, a 2TR-FE four-cylinder, or you've added headers or high-flow cats, the P0420 / P0430 catalyst-efficiency light is one of the most common codes on these trucks.

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 stream, so the ECU stops flagging catalyst efficiency. CNC-machined, M18x1.5 — the standard Toyota O2 thread.

• How many do you need? Count your codes: P0420 only = 1 spacer (2TR four-cylinder, or bank 1 on the V6). P0420 + P0430 = 2 spacers (V6 with dual downstream sensors) — grab the 2-Pack.
• 10-minute install; downstream sensors only, never upstream.
• 90° offset tucks the sensor up out of rock-strike territory.

Fits

Tacoma (2005–present, 1GR/2TR/3UR-family threads), plus FJ Cruiser, 4Runner V6, and Tundra — all M18x1.5 downstream bungs.

FAQ

Will it fix a rattling cat?
No — a physically failed converter needs replacing. This fixes the efficiency code, not broken hardware.

Affect towing or MPG?
No — downstream sensors don't control fueling.

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

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

TIG-welded and machined by Brockett Built in central Illinois. Ships same or next business day. 30-day fitment guarantee.