Engine-CodesInfiniti – P0770 Infiniti

P0770 Infiniti Code - Shift Solenoid Valve 'E' Malfunction

Quick Answer

The P0770 Infiniti code indicates a malfunction in the Shift Solenoid Valve 'E' in the transmission system of the vehicle. Common causes include Electrical faults in the Shift Solenoid Valve 'E', Clogged or dirty transmission fluid filter, Low transmission fluid levels. 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
P0770 Infiniti indicates Shift Solenoid Valve 'E' Malfunction.
Common causes
Common causes include Electrical faults in the Shift Solenoid Valve 'E', Clogged or dirty transmission fluid filter, Low transmission fluid levels.
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.
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0770 Infiniti Description

The P0770 Infiniti code indicates a malfunction in the Shift Solenoid Valve 'E' in the transmission system of the vehicle. The shift solenoid valve is responsible for controlling the flow of transmission fluid to engage or disengage gears within the transmission. In this case, the 'E' solenoid is not functioning properly, which can lead to issues with shifting gears smoothly and efficiently.

OBDII Code P0770 Infiniti - Shift Solenoid Valve 'E' Malfunction
P0770 Infiniti Code - Shift Solenoid Valve 'E' Malfunction

Common Causes of P0770 Infiniti

  1. Electrical faults in the Shift Solenoid Valve 'E'
  2. Clogged or dirty transmission fluid filter
  3. Low transmission fluid levels
  4. Internal transmission damage

Symptoms of P0770 Infiniti

  1. Rough or delayed shifting between gears
  2. Gear slippage or inability to shift
  3. Poor acceleration and decreased fuel efficiency
  4. Illumination of the Check Engine Light

How to Fix P0770 Infiniti

  1. Begin by diagnosing the specific cause of the issue by conducting a thorough inspection of the transmission system and performing a diagnostic scan to retrieve the trouble codes.
  2. If the issue is related to electrical faults in the solenoid, replace the Shift Solenoid Valve 'E' with a new, OEM-quality part.
  3. Check and replace the transmission fluid filter if it is clogged or dirty, ensuring proper fluid flow within the transmission system.
  4. Top up the transmission fluid to the recommended level if it is low, and inspect for any leaks that may be causing fluid loss.
  5. Test drive the vehicle to ensure the shifting issues have been resolved and that the transmission system is functioning correctly.

Cost to Fix P0770 Infiniti

The typical repair costs for resolving a Shift Solenoid Valve 'E' malfunction can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check local rates for a more precise estimate. Generally, most auto repair shops charge between $80 and $150 per hour for labor, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops.

When is the Code Detected?

The P0770 code is detected when the ECM detects an improper voltage drop when it tries to operate the solenoid valve.

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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 P0770 Infiniti Code

1. What does the OBDII code P0770 mean on an Infiniti?

P0770 indicates a malfunction in the Shift Solenoid Valve 'E,' which is responsible for controlling gear shifting in the automatic transmission.

2. What are the symptoms of code P0770 on an Infiniti?

Common symptoms include harsh or delayed shifting, transmission slipping, reduced fuel efficiency, and the Check Engine Light illuminating.

3. What causes the P0770 code on an Infiniti?

The most common causes are a faulty shift solenoid valve, low or dirty transmission fluid, a damaged transmission valve body, or issues with the wiring or connectors.

4. Can I drive my Infiniti with a P0770 code?

Driving with a P0770 code is not recommended, as it can lead to further transmission damage and poor vehicle performance.

5. How do I fix the P0770 code on an Infiniti?

Repairs may include replacing the shift solenoid valve, flushing and refilling the transmission fluid, repairing damaged wiring, or replacing the transmission valve body.

6. How much does it cost to fix code P0770 on an Infiniti?

Repair costs vary but typically range from $200 to $500 for solenoid replacement. More extensive repairs, like valve body replacement, can cost upwards of $1,000.

7. Will clearing the P0770 code fix the problem?

Clearing the code will temporarily turn off the Check Engine Light, but the underlying issue must be resolved to prevent the code from returning.

8. Can low transmission fluid cause a P0770 code?

Yes, low or contaminated transmission fluid can cause improper solenoid operation, leading to a P0770 code.

9. How do I diagnose the P0770 code on my Infiniti?

Diagnosis involves scanning for codes, inspecting the solenoid for electrical faults, checking transmission fluid condition, and testing the wiring and connectors.

10. Is a transmission rebuild required to fix P0770 on an Infiniti?

Not always. Many cases can be resolved by replacing the solenoid or addressing fluid and wiring issues without a full rebuild.

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