What is OBD-II Code P0801 – Reverse Inhibit Control Circuit/Open
As a mechanic, one of the things I have come across multiple times during my career is OBD-II codes, otherwise known as On-Board Diagnostic codes. These codes are generated by vehicles when there is an issue with the system that needs to be addressed. One of these codes is OBD-II Code P0801, which indicates that there is an issue with the Reverse Inhibit Control Circuit/Open. In this article, I will be explaining what this code means, what causes it, and how to repair it.
What is OBD-II Code P0801?
OBD-II Code P0801 refers to the Reverse Inhibit Control Circuit/Open. This code is set when there is a problem with the Reverse Inhibit Control Circuit in the vehicle’s transmission. The Reverse Inhibit Control Circuit is responsible for preventing the car from being shifted into reverse while the car is moving forward. When there is an issue with this circuit, the vehicle’s computer system will set a trouble code so that the driver can address the issue.
What causes OBD-II Code P0801?
There are several things that can cause OBD-II Code P0801 to appear. One of the most common reasons is a faulty Reverse Inhibit Solenoid Valve. This valve is responsible for controlling the Reverse Inhibit Control Circuit, and when it fails or becomes stuck, the circuit can no longer function correctly. Another common cause of this code is a damaged or broken wire in the Reverse Inhibit Control Circuit. This can occur due to stress, wear and tear, or even rodent damage.
How to diagnose OBD-II Code P0801
Diagnosing OBD-II Code P0801 requires a few tools and some technical knowledge. One of the first things that a mechanic will do when they see this code is to connect a diagnostic scanner to the vehicle’s OBD-II port. The scanner will read the code and provide additional information about the issue. This information includes freeze frame data, which shows the conditions in which the code was set, and live data, which shows real-time data from the vehicle’s sensors.
After reading the code, the mechanic will then perform a visual inspection of the reverse inhibit control circuit and solenoid valve. This will involve checking for any damaged, broken, or corroded wires and connections. If the wire, valve, or circuit is found to be damaged, it will need to be replaced.
How to repair OBD-II Code P0801
Repairing OBD-II Code P0801 will depend on the root cause of the issue. If the Reverse Inhibit Solenoid Valve is faulty, it will need to be replaced. This will require the mechanic to remove the transmission pan and locate the valve. Once the valve is replaced, the pan will be reinstalled, and the vehicle will be returned to normal operation.
If the issue is a damaged or broken wire, the wire will need to be repaired or replaced. This can be done by splicing a new section of wire into the existing circuit, or by replacing the entire circuit if necessary.
FAQs
1. Can I drive my car with OBD-II Code P0801?
Driving your car with the OBD-II Code P0801 can be dangerous, as the car may be able to shift into reverse while the car is moving forward. It is recommended to have this issue repaired as soon as possible.
2. How much does it cost to repair OBD-II Code P0801?
The cost to repair OBD-II Code P0801 will depend on the root cause of the issue. On average, repairs can cost anywhere from $200 to $600, including parts and labor.
3. Can OBD-II Code P0801 clear itself?
OBD-II codes do not clear themselves. The issue must be repaired, and the code must be cleared using a diagnostic scanner.
4. How can I prevent OBD-II Code P0801 from appearing?
Regular maintenance of the vehicle’s transmission and surrounding components can help prevent OBD-II Code P0801 from appearing. This includes regular fluid changes, visual inspections, and addressing any issues as soon as they occur.
5. What other codes are related to the transmission?
There are several other codes related to the transmission, including P0730 (Incorrect Gear Ratio), P0700 (Transmission Control System Malfunction), and P1714 (Intermediate Band Broke). These codes indicate a variety of issues with different components of the transmission.
In conclusion, OBD-II Code P0801 indicates an issue with the Reverse Inhibit Control Circuit/Open within a vehicle’s transmission. This issue can be caused by a faulty Reverse Inhibit Solenoid Valve or a damaged wire in the circuit. Diagnosing and repairing this issue requires some technical knowledge and tools, but can be done with relative ease by a trained mechanic. Taking regular care of a vehicle’s transmission can help prevent this issue from occurring.