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 » P073A

Code P073A

Symptoms

• Vehicle is stuck in 5th gear

• Poor acceleration

• Check engine light is on

Common Causes

• Faulty transmission solenoid

• Mechanical failure in the transmission

• Transmission control module (TCM) malfunction

Glossary

Transmission: A system in a vehicle that transmits power from the engine to the wheels.

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

Related Codes

• P0730

• P0731

Laymans terms

The car is having trouble getting out of 5th gear, like when a toy gets stuck and can't move to the next step.

Explanation

This code indicates that the transmission is unable to shift out of 5th gear.

Technical description

The P073A code is triggered when the transmission control module (TCM) detects that the transmission is stuck in 5th gear and cannot shift to another gear. This could be due to mechanical issues within the transmission or problems with the control system.

Diagnosis steps

• Check for other transmission-related codes.

• Inspect the transmission fluid level and condition.

• Test the transmission solenoids and wiring.

Repair procedures

• Replace or repair the faulty transmission solenoid.

• Repair or rebuild the transmission if mechanical failure is found.

• Reprogram or replace the transmission control module (TCM) if needed.

Tools required

• OBD-II scanner

• Transmission fluid level gauge

• Multimeter

Estimated repair cost

$500 - $2500

Difficulty level

Difficult

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regular transmission fluid changes

• Avoid aggressive driving

• Regular vehicle maintenance

Error code type

Transmission Issue

User experience recommendations

• Do not drive the vehicle until the issue is resolved.

• Consult a professional mechanic for diagnosis and repair.

Warranty information

Transmission repairs may be covered under powertrain warranty if the vehicle is still within the warranty period.

Historical data

The P073A code has been associated with transmission issues in vehicles with high mileage or poor maintenance history.

Urgency level

High – Driving with this issue can cause further damage to the transmission.

Legal and safety notice

Ignoring this issue can lead to safety hazards and further mechanical damage.

Testing conditions

• Vehicle at operating temperature

• Driving at a steady speed

Component location

The transmission is located between the engine and the drive shaft, typically under the vehicle.

FAQs

Q: Can I drive my car with a P073A code?
A: It's not recommended to drive with this code as it can cause further damage to the transmission.

Q: How can I prevent my car from getting stuck in gear?
A: Regular maintenance and avoiding aggressive driving can help prevent transmission issues.

Last updated: Jun 9, 2026 • Source: internal database

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