P0430 on a Toyota Tacoma
P0430 means catalyst System Efficiency Below Threshold (Bank 2). On the Tacoma, a few causes come up far more than others.
What P0430 usually means on a Tacoma
P0430 appears only on V6 Tacomas, flagging the bank 2 catalytic converter as below the efficiency the ECU expects. Like the bank 1 P0420, it's usually an aging original converter or a slow rear O2 sensor rather than a sudden fault. On these trucks it tends to arrive at high mileage after years of heat cycling. The check-engine light is steady with no obvious drivability change.
Most common causes on the Tacoma
- Worn bank 2 converter
The V6 Tacoma's second-bank cat loses efficiency with age just like the first.
- Aged bank 2 O2 sensor
A slow rear Denso sensor on that bank can mimic a failing cat.
- Exhaust leak on bank 2
Rust-belt Tacomas develop leaks at manifold and pipe joints that skew the reading.
- Unaddressed bank 2 misfire
A weak coil on that bank pushes fuel into the cat and trips P0430.
What P0430 costs to fix on a Tacoma
Bank 2 converter work on the Tacoma V6 is comparable to bank 1 in part cost but can be tighter to access depending on the exhaust routing. Confirm the rear O2 sensor's readings first, since a sensor is far cheaper than a converter. With converter theft common on trucks, verify you actually have a worn cat and not a stolen or damaged one.
Year, engine and mileage change the answer. Start a case and Redline weighs these causes against what your car shows, then names the check that would settle it.
Other codes on the Toyota Tacoma
Related symptoms
Toyota Tacoma problems & recalls by year
Based on widely reported patterns for this model; individual causes vary by year, engine and history. Generic P0430 behavior is covered on the main P0430 page. Confirm with a scan tool before buying parts.
P0430 on your Tacoma?
Every problem becomes a Case. Tell Redline what your Tacoma is doing: it shows what the evidence supports, what’s still missing, and what to check next, before you approve a repair.
“Inner pad ~1 mm. Outer pad 3 mm.”
Next: check the slide pins move freely before buying parts.