What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

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Home » OBD2 Codes » P0975

Code P0975

Symptoms

• Transmission stuck in one gear

• Harsh or erratic shifting

• Check Engine Light illuminated

Common Causes

• Faulty shift solenoid B

• Wiring issues in the shift solenoid B circuit

• Malfunctioning transmission control module (TCM)

Glossary

TCM: Transmission Control Module

Solenoid: An electromechanical device used to control fluid flow in the transmission

Related Codes

• P0755

• P0976

Official description

Shift Solenoid B Control Circuit Range/Performance

Laymans terms

This code means there's a problem with a part in your car that helps it change gears. It's like when a toy robot gets stuck and can't move its arm properly.

Explanation

The transmission control module (TCM) has detected a problem with the electrical circuit controlling the shift solenoid B. This solenoid is responsible for helping the transmission change gears.

Technical description

The P0975 code is triggered when the TCM detects an issue with the shift solenoid B control circuit. This could be due to a range or performance problem, such as an electrical fault or a mechanical issue within the solenoid itself.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connectors for damage.

• Test the shift solenoid B for proper operation.

Repair procedures

• Replace faulty shift solenoid B.

• Repair or replace damaged wiring/connectors.

• Reprogram or replace the TCM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$150 - $400

Difficulty level

Moderate

Commonly affected vehicles

• Honda Accord

• Toyota Camry

• Ford F-150

Preventive measures

• Regular transmission fluid changes

• Periodic inspection of wiring and connectors

• Avoid harsh driving conditions

Error code type

Transmission Control Issue

User experience recommendations

• Avoid driving the vehicle until repaired to prevent further damage.

• Consult a professional mechanic for diagnosis and repair.

Warranty information

Check if the vehicle's powertrain warranty covers transmission repairs.

Historical data

This code has been commonly reported in vehicles with higher mileage and those with a history of transmission issues.

Urgency level

High – It is important to address this issue promptly to avoid transmission damage.

Legal and safety notice

Driving with transmission issues can lead to unsafe driving conditions. Ensure repairs are completed by a qualified technician.

Testing conditions

• Vehicle at operating temperature

• Transmission in gear

Component location

Shift solenoid B is located inside the transmission, often accessible by removing the transmission pan.

FAQs

Q: Can I drive with a P0975 code?
A: It's not recommended to drive with this code as it can cause further transmission damage.

Q: How is the shift solenoid B replaced?
A: The transmission pan is removed, and the solenoid is accessed and replaced from inside the transmission.

Last updated: Mar 3, 2026 • Source: internal database

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