3rd Gen Tundra: "Reduced engine power" warning with P0243 or P0247, or a rattle from the turbos at idle

Checks, in order

1. Codes first
   P0243 and P0247 are the wastegate actuator circuits for each turbo; P0299 is underboost. With the reduced power message these are warranty claims, and the tech tip tells technicians to consult Toyota before replacing a turbo, so expect a diagnostic visit rather than parts off the shelf.
   easy $ · under about $50
2. Locate a rattle
   At idle, have a helper blip the throttle while you listen at each turbo. A rattle that changes when you press on the actuator rod is the flapper or linkage. A rattle that moves with the exhaust is a heat shield; see the exhaust rattle symptom.
   easy $ · under about $50
3. Check for leaks around the turbos
   Coolant or oil residue on the turbo housings or the smell of coolant after a drive means a line or seal, which is also warranty work. Owners have chased slow coolant loss to the turbo and valley area.
   medium $ · under about $50
4. Warranty position
   Turbos are powertrain parts under the 5 year/60,000 mile warranty. Out-of-warranty prices for the V35A turbo assemblies were not something owners had reported as of this writing.
   easy $ · under about $50

Applies to: 3rd generation Tundra, 2022 on, with the 3.4L twin-turbo V35A-FTS V6 and the 10-speed automatic, including the i-FORCE MAX hybrid. Most items are covered by Toyota's 3 year/36,000 mile basic and 5 year/60,000 mile powertrain warranties or by an open recall, so the first check on this truck is usually a VIN lookup.

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.

Other engine problems on the 3rd Gen Tundra

• Knock from the engine, rough running, stall or no-start (main bearing recall)
• Tinny rattle under the truck on cold starts or at a certain rpm

More 3rd Gen Tundra problems

• Pop or clunk under the truck on the first start of the day, hesitation coming to a stop, harsh 1–2 shift (Transmission)
• "Hybrid system malfunction" or "12V battery charging system malfunction" message (i-FORCE MAX) (Hybrid System)
• Rear camera image missing or wrong, blank instrument cluster, or the multimedia screen reboots (Body & Electrical)
• Vibration or clunk from the rear, gear oil on a rear wheel, or a loose rear axle (2022 recall) (Drivetrain)
• Fuel smell, brake line chafe, or reverse lights with moisture inside (open recalls) (Body & Electrical)

All 8 3rd Gen Tundra 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.