What is the distance between the throttle and MAF

You can try changing the temp sensor. Not the one for the gage/light. Have you tried a scan of the ECM, engine control module?

Diagnostic Aids
Check for the following conditions:
• A skewed or stuck TP sensor. A problem with the TP sensor or TP sensor circuit can cause the VCM to incorrectly calculate the predicted mass air flow value. Observe the throttle angle with the throttle closed. If the throttle angle reading is not 0%, check for the following conditions:
- The throttle plate is sticking or excessive deposits on the throttle plate or the throttle bore
- The TP sensor signal circuit shorted to voltage
- A poor connection or high resistance in the TP sensor ground circuit.
• A misrouted harness. Inspect the MAF sensor harness in order to ensure that it is not routed too close to high voltage wires such as spark plug leads.
• A damaged harness. Inspect the wiring harness for damage. If the harness appears to be OK, observe the scan tool while moving the connectors and the wiring harnesses related to the MAF sensor. A change in the display indicates the location of the fault.
• A plugged intake air duct or dirty air filter element. A wide open throttle acceleration from a stop should cause the mass air flow displayed on a scan tool to increase from about 4-7 gm/s at idle to 100 gm/s or more at the time of the 1-2 shift. If not, check for a restriction.

Circuit Description
The mass air flow (MAF) sensor is an air flow meter. The control module supplies the MAF sensor a signal circuit. An ignition positive voltage circuit and a ground circuit are supplied to the MAF sensor by independent circuits. The MAF sensor heats a wire element, or grid, within the MAF sensor in order to maintain a calculated temperature. As inlet air flows across and cools the grid, the MAF sensor increases current flow to the grid in order to maintain the constant grid temperature. The MAF sensor converts the grid current flow into a frequency signal. The control module converts the MAF signal frequency into a grams per second value. During low air flow rates, such as at engine idle, the MAF sensor produces a low frequency signal. During high air flow rates, such as at wide open throttle-road load, the MAF sensor increases the frequency signal. The control module monitors the MAF sensor signal frequency in order to calculate the flow and mass of the air entering the engine.
The VCM monitors the MAF sensor air flow rate and compares this signal to a VCM calculated air flow rate. The calculated air flow is based on engine speed and barometric pressure. The VCM uses the MAP sensor in order to determine the barometric pressure when the ignition key is turned ON but before the engine is cranking or running. This DTC will be set if the MAF sensor signal airflow rate does not match the air flow rate calculated by the VCM.

Restricted air flow. Replace the air filter if dirty. Clean the throttle body and MAF sensor. I use brake clean. Use a tooth brush on the throttle body , just spray down the MAF sensor. Leave the MAF off, start the car and spray some in the throttle as you rev it up. If the engine light comes on, it is because of the MAF being off. It will go out in a day or two. Or you can have it cleared.

clean the throttle body, disconnect the MAF to se if problem goes away. Clean MAF or replace it. Check IAC, idle air control valve, replace if needed. MAF is Mass Air Flow. Use only electronic carb cleaner! Regular carb cleaner will damage MAF.Check throttle linkage for kink or blockage.

Autozone, carquest ect. sell MAF sensor cleaner. Do not touch the sensor because it will most likely break. Pull the throttle body off and spray it down with the MAF cleaner. Brake cleaner is supposed to work but cannot verify that in all vehicles and sometimes carb clean will work depending on the vehicle.

no clean it , use CRC Maf sensor cleaner, from 12" distant
carefully .
the maf can last the life of an engine, 300k, easy, if cleaned time to time... at the 30k service?
first google hit P1 means toy only code, (factory)
P2112 Toyota - Throttle Actuator Control System - Stuck Closed

Possible causes
- Throttle Body Plate Binding
- Faulty Throttle Actuator
- Throttle Actuator harness is open or shorted
- Throttle Actuator circuit poor electrical connection

It is highly possible,

PO 1121 ---Throttle Position Sensor Inconsistent
with MAF Sensor


PCM monitorsTPS to MAF readings

If readings are not consistant with calibrated load values
the test fails & a DTC is set on your dash (1121)

Air Leak between MAF & Throttle Body
Bad TPS
Bad MAF

With the MAF disconnected you have no way to
monitor the air intake or air temp.

I would suggest you let a repair shop diagnose your issues

It could be a dirty (MAF) Mass Airflow Sensor or a dirty Throttle Body, Get some MAF cleaner at your local auto parts store and take apart the plastic ducting that attaches to the Throttle Body and use the cleaner on the inside of the Throttle Body and MAF sensor. Cleaning this takes off the carbon build-up and dirt which affects throttle response.

3.8L Engine To Remove:
MAF Location

1. Disconnect the battery ground cable.
2. Remove the fuel injector cover.
3. Disconnect the mass air flow (MAF) sensor electrical connector.
4. Remove the MAF sensor mounting screws.
5. Remove the MAF sensor from the throttle body.

To Install:

1. Position the MAF sensor on the throttle body.
2. Install the MAF sensor mounting screws. Tighten the mounting screws to 27 in lb (3 Nm).
3. Connect the mass air flow (MAF) sensor electrical connector.
4. Install the fuel injector cover.
5. Connect the battery ground cable.