Checks, in order
- Intake hoses and clampsInspect the air box, intake tube and clamps for splits or loose connections between the mass airflow sensor and the throttle body.easy $ · under about $50
- PCV hose and valveCheck the PCV hose for cracks and the connections for tightness. A leaking PCV path is a common lean cause.easy $ · under about $50
- Mass airflow sensorClean only with MAF-safe cleaner and never touch the element. Look at live data for airflow at idle against known-good values for your engine.easy $ · under about $50
- Short term and long term fuel trimsLarge positive trims at idle that settle at higher rpm point to a vacuum leak. Positive trims that stay high at all speeds suggest a fuel delivery issue.medium $ · under about $50
- Smoke testA smoke machine finds small vacuum or intake leaks fast. Many shops will do this for a modest fee.medium $$ · about $50 to $500
Applies to: 2016 to 2023 Tacoma with the 2TR-FE 2.7L four and the 2GR-FKS 3.5L V6, with the 6-speed automatic or 6-speed manual. Engine-specific checks are labeled; everything else applies to both.
Tools and parts for these checks
Links below are affiliate links: toyotadata earns a commission from VEVOR and, as an Amazon Associate, from qualifying Amazon purchases, at no extra cost to you. Confirm fitment for your exact truck before you order.
| ITEM | USED FOR | BUY |
|---|---|---|
| Bluetooth OBD2 scanner with live data | Reading and clearing codes and watching live sensor data | Shop on Amazon |
| MAF sensor cleaner | Cleaning the mass airflow sensor | Shop on Amazon |
| EVAP smoke leak detector, 12V | Finding vacuum and intake leaks | Shop on VEVOR |
Other emissions problems on the 3rd Gen Tacoma
More 3rd Gen Tacoma problems
- Automatic keeps hunting between gears or downshifts early on hills (Transmission)
- Harsh, delayed or shuddering shifts, flare between gears (Transmission)
- Engine temperature climbing or overheating warning (Cooling)
- Turn the key or press the button: click or nothing, engine won't crank (Starting & Charging)
- Engine cranks but won't start or dies right after starting (Fuel & Ignition)
- Rough idle, shaking at a stop or misfire (P0300 to P0306) (Fuel & Ignition)
All 16 3rd Gen Tacoma symptoms in the interactive troubleshooter →
General guidance from owner experience. Confirm torque specs, fluid capacities and procedures in the factory service manual. Brakes, steering and anything structural: if in doubt, have a qualified shop inspect it before driving.