Answer
Jun 13, 2024 - 11:12 PM
A P2127 code indicates an issue with the Accelerator Pedal Position (APP) Sensor, specifically a low input signal from sensor circuit 2. Since you've already replaced the throttle body, sensor, and pedal, let's consider a few other possibilities:
Wiring and Connections: Check for damaged, corroded, or loose wiring and connectors between the APP sensor and the engine control module (ECM). A poor connection can cause low or no signal.
Ground and Power Supply: Ensure the APP sensor is getting proper power and ground. Use a multimeter to verify the voltage and ground at the sensor's connector.
ECM Issues: While less common, a faulty ECM can cause erroneous readings. Ensure the ECM connectors are secure and free of corrosion.
Intermittent Problems: Sometimes, issues can be intermittent and harder to track. Wiggle the wiring harness while monitoring the data to see if the signal drops or changes.
Double-check these areas, and you might find the culprit. If the problem persists, consider having the vehicle diagnosed by a professional with advanced diagnostic tools to pinpoint the issue accurately.
You may need some parts in the process, click this link to be directed to our website where your vehicle information has already been entered. Simply enter the part's name into the search field to get started.
Good luck getting your Tundra back in the game!
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