P0772 Shift solenoid valve “E” stuck on

P0772 – OBD-II Trouble Code Technical Description

P0772 indicates that the PCM has detected a problem with the shift solenoid valve “E” being stuck in the ON position.

What does the fault code mean P0772?

Trouble code P0772 indicates a problem with the shift solenoid valve “E”. This means that the automatic transmission control module (PCM) has detected a discrepancy between the actual and required gear ratios in the transmission system. Error codes may also appear along with this code. P0770, P0771, P0773 и P0774. If the actual gear ratio does not match the required one, P0772 will appear and the Check Engine Light will illuminate. Typically, the gear ratio is determined depending on the vehicle speed, engine speed and throttle position. It should be noted that in some cars the warning light does not come on immediately, but only after the error has appeared multiple times.

Possible reasons

Some possible reasons for the P0772 trouble code:

• Defect or damage to the gear shift solenoid valve “E”.
• Overheating of the transmission fluid, which can cause the valve to malfunction.
• There is insufficient or contaminated transmission fluid, interfering with the normal functioning of the valve.
• Poor electrical connection to solenoid valve “E”.
• Damaged or broken wiring in the solenoid valve “E” circuit.
• Problems with the automatic transmission control module (PCM) that may affect the transmission of signals to the valve.

These are just general causes, and an accurate diagnosis may require a more detailed examination of the vehicle by a specialist.

What are the symptoms of a fault code? P0772?

Some of the possible symptoms when trouble code P0772 occurs:

• Uneven gear shifting: The vehicle may experience incorrect or uneven gear shifting, which may result in jerking or delays when changing speed.
• Increased fuel consumption: Due to an incorrect gear ratio or a stuck “E” valve, the engine may operate less efficiently, resulting in increased fuel consumption.
• Changes in engine behavior: Changes in engine performance, such as increased idle speed or unusual sounds, may be observed.
• Turning on the Check Engine Light: When P0772 occurs, the Check Engine light on the vehicle's dashboard will be activated.

How to diagnose a fault code P0772?

The following steps are recommended to diagnose DTC P0772:

1. Scanning error codes: Use a vehicle scanner to read error codes from the Trouble Code (DTC) memory. Make sure the P0772 code is indeed in the error list.
2. Checking the transmission fluid level: Check the level and condition of the transmission fluid. Low level or contaminated fluid may cause the “E” shift valve to not operate properly.
3. Visual inspection of wires and connectors: Inspect the wires and connectors associated with the “E” solenoid valve. Make sure they are not damaged, broken or oxidized.
4. Electrical circuit check: Use a multimeter to check the electrical circuit associated with solenoid valve “E”. Make sure the voltage and resistance are within normal limits.
5. Shift Valve Diagnostics: Test the solenoid valve “E” to check its functionality. This may include a resistance test and a leak test.
6. Software check: Sometimes the problem may be related to the engine control module (PCM) software. Check for software updates and perform them if necessary.
7. Consultation with a professional: In case of difficulties or if you are not confident in your skills, it is recommended to contact a professional auto mechanic or auto repair shop for further diagnosis and repair.

Please note that these steps provide general guidance only. It is important to follow the instructions provided by the vehicle manufacturer and take into account the specific model and its control system.

Diagnostic errors

When diagnosing DTC P0772, the following errors may occur:

• Misinterpretation of symptoms: Some symptoms, such as shifting problems or unusual noises from the transmission, may be mistakenly attributed to other problems, which can lead to misdiagnosis.
• Skipping important steps: Not performing a complete diagnostic may result in missing important steps, such as checking the transmission fluid level and condition or thoroughly checking the electrical circuit.
• Errors when testing components: Incorrect testing or interpretation of solenoid valve “E” or electrical circuit test results may result in incorrect diagnosis.
• Scanner software problems: Using an inappropriate or outdated vehicle scanner that is unable to correctly interpret error codes or provide necessary system status information.
• Improper maintenance or repair: Attempting repairs or maintenance yourself without sufficient experience and knowledge may result in additional problems or damage to other components.

To minimize diagnostic errors, it is recommended to follow the diagnostic procedures provided by the vehicle manufacturer and use high-quality equipment.

How serious is the fault code? P0772?

Trouble code P0772 indicates a problem with the shift solenoid valve “E” that is stuck in the on position. This may cause the automatic transmission to not operate properly, which could affect the performance and safety of the vehicle. Although the vehicle may continue to drive, it may not run smoothly and in some cases may develop serious transmission problems that may result in the need for major repairs. Therefore, code P0772 should be considered serious and requires immediate attention.

What repair will help eliminate the code? P0772?

To resolve DTC P0772, which is associated with the Shift Solenoid Valve “E” being stuck in the ON position, the following steps may be required:

1. Checking the electrical circuit: First of all, you need to check the electrical circuit associated with the solenoid valve. This includes checking the wiring, connectors and connections for damage, corrosion or breaks.
2. Replacing the solenoid valve: If the electrical circuit is OK, the shift solenoid valve itself may need to be replaced.
3. Transmission service: If there are problems with the solenoid valve, transmission service or repair may also be required to correct any damage caused by the valve being stuck.
4. Software update: Sometimes problems with electronics can be associated with software errors in the vehicle's control software (firmware). In this case, it may be necessary to update the transmission control module software.
5. Diagnostics and testing: After any repair work, diagnostics and testing must be performed to ensure that the problem is resolved and the P0772 trouble code no longer appears.

In case of serious problems with the transmission or electronics of the vehicle, it is recommended to contact a professional auto mechanic or service center for diagnosis and repair.

What is P0772 Engine Code [Quick Guide]

P0772 – Brand-specific information

Trouble code P0772 is specific to Variable Ratio Transmissions (CVT), so it will be correct for vehicles with this type of transmission. List of some common car brands with their definitions:

1. Nissan/Infiniti:
   • P0772: Shift solenoid "E" is operating or stuck in the on position.
2. Honda/Acura:
   • P0772: Problem with internal control solenoid valve 'C'.
3. Toyota / Lexus:
   • P0772: Problem with internal control solenoid valve 3.
4. Subaru:
   • P0772: Shift solenoid "E" is operating or stuck in the on position.
5. Mitsubishi:
   • P0772: Problem with internal control solenoid valve “E”.
6. Ford:
   • P0772: Problem with internal control solenoid valve E.
7. Jeep:
   • P0772: Shift solenoid "E" is operating or stuck in the on position.
8. Dodge / Chrysler:
   • P0772: Problem with internal control solenoid valve E.
9. Chevrolet / GMC:
   • P0772: Shift solenoid "E" is operating or stuck in the on position.
10. Honda/Acura:
    • P0772: Problem with internal control solenoid valve “E”.

These are just a few examples, and there are different models and years of vehicles that may have this trouble code. If you are having a problem with this error code, it is recommended that you consult your specific vehicle's repair manual or contact a professional for more accurate diagnosis and repair.