As a car owner, there are few things more frustrating than when your vehicle’s check engine light comes on. The anxiety of not knowing what could be wrong with your car can be overwhelming.
One of the most common reasons for a check engine light to come on is a P0773 error code.
This error code is associated with the transmission and specifically the shift solenoid D. In this article, we will discuss everything you need to know about the P0773 error code and what steps you can take to resolve it.
What is the P0773 Error Code?
The P0773 error code is a generic OBD-II diagnostic trouble code that indicates an issue with the transmission’s shift solenoid D.
The shift solenoid D is responsible for regulating the transmission’s hydraulic pressure.
When the transmission control module (TCM) detects an intermittent or complete failure with the shift solenoid D, it will trigger the check engine light and log the P0773 error code.
Symptoms of the P0773 Error Code
There are several symptoms that you may experience if your vehicle has a P0773 error code. These symptoms include:
- Check engine light is on
- Transmission slipping or hesitation when shifting gears
- Harsh shifting or knocking when shifting gears
- Transmission stuck in one gear
- Decreased fuel efficiency
If you are experiencing any of the above symptoms, it is important to take your vehicle to a qualified mechanic as soon as possible to avoid further damage to your transmission.
Causes of the P0773 Error Code
There are several potential causes of the P0773 error code. These causes include:
- Malfunctioning shift solenoid D
- Wiring issues in the shift solenoid D circuit
- Electrical connector issues in the shift solenoid D circuit
- Low transmission fluid levels
- Dirty or contaminated transmission fluid
- Failed transmission control module (TCM)
- Faulty transmission pump
- Internal transmission damage
How to Fix the P0773 Error Code
Fixing the P0773 error code will depend on the underlying cause of the issue. Here are some steps you can take to diagnose and fix the issue:
- Check the transmission fluid level and condition. If the fluid is low or dirty, have it changed or topped off.
- Inspect the wiring and electrical connectors in the shift solenoid D circuit. If there are any issues, repair or replace as necessary.
- Replace the shift solenoid D if it has failed.
- Replace the transmission pump if it has failed.
- Replace the transmission control module (TCM) if it has failed.
- If none of the above steps resolve the issue, it may be necessary to have the transmission inspected by a qualified mechanic.
The P0773 error code can be a frustrating issue for car owners to deal with. However, with proper diagnosis and repairs, it can be resolved. It is important to address the issue as soon as possible to avoid further damage to your vehicle’s transmission. If you are unsure of how to diagnose or fix the issue, it is always best to take your vehicle to a qualified mechanic.
- Is it safe to drive with a P0773 error code?
It is not recommended to drive with a P0773 error code. The issue can cause further damage to your vehicle’s transmission and may leave you stranded on the road.
- How much does it cost to fix a P0773 error code?
The cost to fix a P0773 error code can vary widely depending on the underlying cause of the issue. It is best to take your vehicle to a qualified mechanic for a diagnosis and estimate.
- Can I reset the P0773 error code myself?
While it is possible to reset the check engine light using an OBD-II scanner, it will not fix the underlying issue causing the P0773 error code.
- What is a shift solenoid?
A shift solenoid is an electro-hydraulic valve that controls the flow of transmission fluid in the transmission. The solenoid is responsible for regulating the hydraulic pressure that controls the transmission’s shifting.
- How do I prevent the P0773 error code from occurring in the future?
Regular maintenance of your vehicle’s transmission, including changing the fluid and servicing the shift solenoids, can help prevent the P0773 error code from occurring in the future.