P0758 – OBD-II DTC

OBD-II DTC P0758 – Shift Solenoid B Malfunction

DTC P0758 meaning

DTC P0758 refers to a malfunction in the Shift Solenoid B of the transmission system. The shift solenoids are responsible for controlling the flow of transmission fluid, which in turn affects the shifting of gears. When the Engine Control Module (ECM) detects an issue with Shift Solenoid B, it triggers this diagnostic trouble code (DTC). This can lead to improper shifting, reduced performance, and potential damage to the transmission if not addressed.

DTC P0758 symptoms

Common symptoms associated with DTC P0758 include:

• Delayed or harsh shifting between gears
• Transmission slipping or failing to engage
• Check Engine Light illuminated on the dashboard
• Unusual noises from the transmission
• Reduced fuel efficiency

DTC P0758 causes

Several factors can lead to the occurrence of DTC P0758, including:

• Faulty Shift Solenoid B
• Wiring issues or damaged connectors related to the solenoid
• Low transmission fluid levels or dirty fluid
• Faulty Transmission Control Module (TCM)
• Internal transmission problems

DTC P0758 seriousness

DTC P0758 is considered a serious issue as it can affect the vehicle’s drivability and transmission performance. If left unresolved, it may lead to further transmission damage, increased repair costs, and potential safety hazards while driving. It is advisable to address this code promptly to avoid more extensive issues.

How to diagnose DTC P0758

To diagnose DTC P0758, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P0758 code.
2. Inspect the transmission fluid level and condition.
3. Check the wiring and connectors related to Shift Solenoid B for damage or corrosion.
4. Test the resistance of Shift Solenoid B using a multimeter.
5. Examine the Transmission Control Module (TCM) for faults.
6. Perform a road test to observe shifting behavior and any related symptoms.

How to fix DTC P0758 step-by-step instructions

To fix DTC P0758, follow these step-by-step instructions:

1. Start by checking the transmission fluid level and condition. Replace or top off the fluid if necessary.
2. Inspect the wiring and connectors for Shift Solenoid B. Repair or replace any damaged components.
3. Test Shift Solenoid B for proper resistance. If it is out of specification, replace the solenoid.
4. If the solenoid is functioning correctly, check the TCM for any faults or updates.
5. Clear the DTC using an OBD-II scanner and take the vehicle for a test drive to see if the code returns.
6. If the code reappears, further investigation into internal transmission issues may be required.

How to erase DTC P0758

To erase DTC P0758, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to ensure the code does not return.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.