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P0773 Lexus Code - Shift Solenoid 'E' Electrical Malfunction

Quick Answer

The P0773 diagnostic trouble code for Lexus vehicles indicates a Shift Solenoid 'E' Electrical Malfunction. Common causes include Faulty shift solenoid 'E', Wiring issues or electrical connection problems, Low transmission fluid level or dirty fluid. 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
P0773 Lexus indicates Shift Solenoid 'E' Electrical Malfunction.
Common causes
Common causes include Faulty shift solenoid 'E', Wiring issues or electrical connection problems, Low transmission fluid level or dirty fluid.
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 10, 2024
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Code P0773 Lexus Description

The P0773 diagnostic trouble code for Lexus vehicles indicates a Shift Solenoid 'E' Electrical Malfunction. In automatic transmissions, shift solenoids are responsible for controlling the flow of transmission fluid, which in turn controls the shifting of gears. Solenoid 'E' specifically is tasked with regulating the transmission's electronic pressure control. When this solenoid malfunctions electrically, it can lead to issues with gear shifting, causing the vehicle to experience problems with acceleration, fuel efficiency, and overall performance.

OBDII Code P0773 Lexus - Shift Solenoid 'E' Electrical Malfunction
P0773 Lexus Code - Shift Solenoid 'E' Electrical Malfunction

Common Causes of P0773 Lexus

  1. Faulty shift solenoid 'E'
  2. Wiring issues or electrical connection problems
  3. Low transmission fluid level or dirty fluid
  4. Internal transmission damage or wear
  5. Software or programming issues in the transmission control module

Symptoms of P0773 Lexus

  1. Delayed or rough shifting between gears
  2. Transmission slipping or jerking during acceleration
  3. Inability to shift into certain gears
  4. Illumination of the Check Engine Light
  5. Reduced fuel efficiency

How to Fix P0773 Lexus

  1. Diagnose the issue using a professional diagnostic scan tool to confirm the P0773 code and pinpoint the exact cause of the malfunction.
  2. Inspect the wiring and electrical connections related to shift solenoid 'E' for any damage or corrosion. Repair or replace as necessary.
  3. Check the transmission fluid level and condition. Top up the fluid or perform a transmission fluid flush if needed.
  4. If the shift solenoid 'E' is found to be faulty, replace it with a new solenoid and ensure proper installation.
  5. Clear the diagnostic trouble codes from the vehicle's computer and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0773 Lexus

The typical repair costs for addressing a P0773 Shift Solenoid 'E' Electrical Malfunction can range from $200 to $500, including parts and labor. However, it is essential to note that the actual cost can vary depending on the specific make and model of the vehicle, the location of the repair shop, and the extent of the damage. Diagnostic time and labor rates at auto repair shops can fluctuate, with rates typically ranging between $80 and $150 per hour. It is advisable to obtain quotes from multiple repair shops to ensure a more accurate estimate for the repair.

When is the Code Detected?

The P0773 code is detected when the gear required by the ECM does not match the actual gear when vehicle is driven.

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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 P0773 Lexus Code

1. What does the OBDII code P0773 mean on a Lexus?

P0773 indicates a Shift Solenoid 'E' Electrical Malfunction, meaning the transmission control system has detected an issue with the electrical circuit of the solenoid responsible for controlling gear shifts.

2. What are the common symptoms of code P0773 in a Lexus?

Symptoms may include harsh or delayed shifting, failure to shift into certain gears, decreased fuel efficiency, and illumination of the Check Engine Light.

3. What causes the P0773 code in a Lexus?

Common causes include a faulty shift solenoid 'E', damaged wiring or connectors in the solenoid circuit, transmission fluid contamination, or a malfunctioning transmission control module (TCM).

4. Can you drive a Lexus with a P0773 code?

While it may still be drivable, driving with this code can cause further damage to the transmission. It's best to address the issue as soon as possible.

5. How do you diagnose the P0773 code in a Lexus?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the solenoid wiring and connectors for damage or corrosion, testing the solenoid with a multimeter, and checking the transmission fluid condition.

6. How do you fix the P0773 code on a Lexus?

Repairs may include replacing the shift solenoid 'E', repairing or replacing damaged wiring, cleaning or replacing connectors, or servicing the transmission fluid.

7. How much does it cost to fix the P0773 code on a Lexus?

Repair costs vary but typically range from $150 to $400 for solenoid replacement. Additional costs may apply for wiring repairs or fluid changes.

8. Can low transmission fluid cause the P0773 code?

Yes, low or contaminated transmission fluid can affect solenoid operation, potentially triggering the P0773 code.

9. What tools are needed to troubleshoot the P0773 code in a Lexus?

You’ll need an OBDII scanner, a multimeter for electrical testing, and possibly tools to access the transmission components.

10. Will resetting the Check Engine Light fix the P0773 code on a Lexus?

No, resetting the light will not fix the underlying issue. The problem must be properly diagnosed and repaired to prevent the code from returning.

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