Engine-Codes.com
Engine-Codes – Toyota – P2138 2001 Toyota Highlander

P2138 2001 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation

Quick Answer

The P2138 code for a 2001 Toyota Highlander indicates a problem with the Throttle Pedal Position Sensor/Switch 'D'/'E' voltage correlation. Common causes include Faulty throttle pedal position sensor, Damaged wiring or connectors in the throttle system, Malfunctioning ECM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2138 2001 Toyota Highlander indicates Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation.
Common causes
Common causes include Faulty throttle pedal position sensor, Damaged wiring or connectors in the throttle system, Malfunctioning ECM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P2138 2001 Toyota Highlander Description

The P2138 code for a 2001 Toyota Highlander indicates a problem with the Throttle Pedal Position Sensor/Switch 'D'/'E' voltage correlation. Essentially, this code is triggered when the voltage readings from these sensors do not align as expected, signaling a potential issue with the throttle system. The throttle pedal position sensor is responsible for monitoring the position of the accelerator pedal and sending that information to the engine control module (ECM). The ECM uses this data to adjust the throttle opening, fuel delivery, and ignition timing to optimize engine performance.

OBDII Code P2138 2001 Toyota Highlander - Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation
P2138 2001 Toyota Highlander Code - Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation

Common Causes of P2138 2001 Toyota Highlander

  1. Faulty throttle pedal position sensor
  2. Damaged wiring or connectors in the throttle system
  3. Malfunctioning ECM
  4. Issues with the throttle body or related components
  5. Software glitch or calibration error

Symptoms of P2138 2001 Toyota Highlander

  1. Poor acceleration or delayed response when pressing the accelerator pedal
  2. Rough idling or engine stalling
  3. Reduced engine power or difficulty maintaining speed
  4. Illumination of the Check Engine Light

How to Fix P2138 2001 Toyota Highlander

  1. Begin by conducting a thorough inspection of the throttle pedal position sensor and wiring. Look for any signs of damage or corrosion.
  2. Test the voltage readings from sensors 'D' and 'E' using a multimeter to determine if they are within the specified range.
  3. If necessary, replace the faulty throttle pedal position sensor or repair any damaged wiring connections.
  4. Clear the diagnostic trouble codes from the ECM and reset the system to see if the issue persists.
  5. If the problem persists, consider seeking professional assistance to diagnose and repair any underlying issues with the ECM or throttle body.

Cost to Fix P2138 2001 Toyota Highlander

The typical repair costs for addressing a P2138 code on a 2001 Toyota Highlander can vary depending on the specific cause of the issue. In general, the cost of replacing a throttle pedal position sensor can range from $100 to $300, including parts and labor. However, if additional components such as wiring or the ECM need to be replaced, the total cost could be higher.

Need more information about the P2138 2001 Toyota Highlander code?

Need more information on how to fix the P2138 2001 Toyota Highlander code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2138 2001 Toyota Highlander code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2138 2001 Toyota Highlander Code

1. What are the common symptoms of OBDII code P2138 in a 2001 Toyota Highlander?

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and illuminated Check Engine light.

2. What causes the Throttle Pedal Position Sensor/Switch 'D'/'E' Voltage Correlation error code in a 2001 Toyota Highlander?

- The most common causes of P2138 in a Toyota Highlander are a faulty throttle position sensor, issues with the throttle pedal position sensor, or wiring/connectivity problems.

3. How can I diagnose OBDII code P2138 in my 2001 Toyota Highlander?

- Diagnosing P2138 involves using a scan tool to read the code, inspecting the throttle position sensor and pedal position sensor, and checking the wiring and connectors for any damage or corrosion.

4. Can I still drive my 2001 Toyota Highlander with OBDII code P2138?

- It is not recommended to drive with P2138 as it can cause unsafe driving conditions due to potential loss of power or acceleration issues. It's best to address the issue promptly.

5. How do I repair OBDII code P2138 in my 2001 Toyota Highlander?

- Repairing P2138 may involve replacing the throttle position sensor, throttle pedal position sensor, or repairing any damaged wiring/connectors. It is recommended to follow the specific diagnostic and repair procedures outlined in the service manual.

6. Are there any DIY tips for fixing OBDII code P2138 in a 2001 Toyota Highlander?

- While some may attempt to replace the throttle position sensor or pedal position sensor themselves, it is recommended to have a professional technician diagnose and repair the issue to ensure proper resolution.

7. How much does it cost to fix OBDII code P2138 in a 2001 Toyota Highlander?

- The cost of fixing P2138 can vary depending on the specific cause of the issue, the labor rates in your area, and whether you choose to use OEM or aftermarket parts. It's best to consult with a mechanic for an accurate estimate.

8. Can resetting the OBDII code P2138 in my 2001 Toyota Highlander make it go away permanently?

- Resetting the code may temporarily turn off the Check Engine light, but if the underlying issue causing P2138 is not addressed, the code is likely to return. It's important to diagnose and repair the root cause of the problem.

9. Is OBDII code P2138 a common issue in 2001 Toyota Highlanders?

- While P2138 may not be as common as some other codes, it can still occur in 2001 Toyota Highlanders, particularly as the vehicle ages and sensor components wear out.

10. How long does it typically take to fix OBDII code P2138 in a 2001 Toyota Highlander?

- The repair time for P2138 can vary depending on the exact cause of the issue and the availability of parts. In general, it may take a few hours to a full day for a mechanic to diagnose and repair the problem.

Discuss the causes and fixes for P2138 2001 Toyota Highlander OBDII Code

Submit a New Comment

Code P2138 2001 Toyota Highlander comments

No comments found for this page.