Checks, in order
- Read the codes and freeze-frame dataNote which cylinder is misfiring or which bank is lean. Freeze-frame shows the conditions when it set.easy $ · under about $50
- Intake leaks and hosesInspect the intake boot, PCV hoses and vacuum lines for cracks. With the engine idling, spray carb cleaner lightly near joints and listen for a change.easy $ · under about $50
- MAF sensor and throttle bodyClean the MAF with a spray made for it and clean the throttle body per the manual. Dirty parts skew fuel trim and idle.easy $ · under about $50
- Spark plugs and coilsCheck plug condition and gap, and swap a suspect coil to a different cylinder to see if the misfire follows it.easy $ · under about $50
- Fuel pressure and injectorsIf basics pass, test fuel pressure and check for clogged injectors. A weak pump causes lean codes under load.medium $$ · about $50 to $500
Applies to: 2005 to 2015 Tacoma with the 2TR-FE 2.7L four-cylinder and 1GR-FE 4.0L V6, 2WD, PreRunner and 4WD. Both engines use timing chains and a serpentine-belt-driven water pump.
Tools and parts for these checks
Links below are Amazon affiliate links: as an Amazon Associate, toyotadata earns from qualifying 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 |
| Ignition coil | Swapping a suspect coil after the misfire follows it | Shop on Amazon |
| Spark plugs | Replacing worn plugs at the factory interval | Shop on Amazon |
| MAF sensor cleaner | Cleaning the mass airflow sensor | Shop on Amazon |
More 2nd Gen Tacoma problems
- Frame rust: flaking, holes or a soft frame (Frame & Body)
- Rear sag, squeaks or a cracked rear leaf spring (Steering & Suspension)
- Clunk, knock or rattle going over bumps (Steering & Suspension)
- Steering feels stiff, rattles or wanders (Steering & Suspension)
- Shaking, shimmy or violent wobble at highway speed (Steering & Suspension)
- Humming or rumbling from the front that changes with speed (Front Axle)
All 16 2nd 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.