comments:
No movement like the other person said. Someone didn't bleed the coolant fully. There's a bleeder screw in front of the inverter, should be 10mm. Get the following Some extra coolant from your local auto parts or big box store in the correct Asian/Toyota Pink/Red formulation MAF sensor cleaner A wrench with a combination end (preferable) or a socket and ratchet of the correct size A small diameter funnel Some aquarium or similar clear vinyl tubing with an inner diameter of 6mm and at least 450mm/45cm long (or more). Open the reservoir the same way you have in the video and rotate the rubber overflow hose so that the end points up. Top off the reservoir to the FULL mark if you haven't already. Carefully loosen the bleed screw. You may have to hold the bottom of the bleeder assembly/mount with one hand and turn with the other to prevent it from twisting. Now attach the tubing to the bleeder screw and stick the other end into the reservoir ensuring that the end is submerged in coolant (see the below picture). An easy way to do this if your funnel has a peg hanging hole like the ones I linked is feed the hose through that hole, so it stays in place. Now, repeat the following until air bubbles stop coming out of the bleeder valve and the pump gets quieter. Ensure the coolant level is at the full mark Put the vehicle in accessory mode (READY OFF, POWER ON) just as you did in the video and watch the coolant level. It should drop as the air flows out of the bleeder valve, just ensure that the level doesn't fall too low and top it up to the "FULL" mark as needed. Once the pump stops running after about a minute turn the vehicle OFF and wait at least 1 minute. This allows the pump motor to cool and is a good time to top off the fluid if necessary. Cycle the ignition on and allow the pump to run again until it shuts off. You should see air bubbles and fluid slowly making their way through the clear tube each time. Repeat steps 2-5 three times. After doing this air should no longer be coming out of the bleeder screw and the pump should be quieter. Once the pump has quieted down all the air has been bleed from the system. If it takes less than 3 repetitions, even better. Close the bleeder valve and tighten it fully Remove the tubing Rotate the rubber overflow hose back down to its normal position. Top off the coolant to the FULL mark for the final time if it isn't already there! Start the vehicle in "READY ON" mode and allow the engine to run for 5 minutes or so. This will ensure that the code self-clears. Also why did the shop replace the AFR/Lambda sensor? A P0171 almost always means it's doing its job correctly! If the sensor wasn't working properly, it would throw its own code! If possible, get a refund and reinstall the original O2 sensor. Check for air leaks around the MAF, then remove it and clean it with the appropriate cleaner per instructions. If that fixes the lean code, then plan on replacing the MAF in the near future should the code reoccur with a Toyota/Lexus branded or Denso sensor.