What is the P0644 fault number? What is the failure description for Driver Display Serial Communication Circuit? How do you fix the P0644 fault code What are the causes and symptoms of the P0644 error code?
What is the P0644 Fault code? What does it all mean?
The P0644 fault code is defined as “Driver Display Serial Communication Circuit” fault. This indicates that the powertrain controller module (PCM), has detected fault in the driver serial communication circuit.
While the LCD screen that is visible on the dash is known as the driver display, it can also be the LCD screen that is located on the windshield. In some cases, the head-up display (or HUD) displays are displayed on the driver’s side windshield. Serial data communication is used to communicate between the PCM (and other onboard controllers) due to space and cost constraints. “Serial data communication” It is the sequential sending bits of data over the same channel. It sends all data in 1-bit chunks using a single channel. Serial communication works on a single channel and has replaced parallel communication in many places. Parallel communication is more cost-effective than serial communication. It can also reduce cable costs and solve synchronization issues quickly and economically. All onboard serial data communication is handled using the controller/controller area network (CAN) bus. The controller/controller area network (CAN) is a group of connectors and cables that are connected to form a harness. Fault code P0644 will be set if the PCM or any other control modules detects a fault within the driver display serial data communications circuit.
The P0644 fault code can affect vehicles of all makes and models, including but not limited to Mercedes-Benz, Renault Fiat, Porsche (Fiat), Fiat, Mitsubishi, Suzuki or Ford.
What is the P0644 Fault Code and Why Does It Happen?
Here are some reasons why P0644 should be set.
- – Broken, damaged, melted or corroded connectors or cables on the CAN bus.
- – Defective driver LCD display
- Faulty relay or blownfuses
- – PCM ground wire or electrical connection error
- – The PCM has become faulty or requires reprogramming
What are the symptoms for P0644’s Fault Code?
You may experience the following symptoms if your vehicle has the code P0644:
- – Illumination at the check engine lights
- LCD Screen loss
- – Other fault codes can be set
How do I fix the P0644 fault code?
The following repairs may be able to resolve the P0644 fault code:
- – Repair or replace any damaged, disconnected, corroded or shorted components, connectors, and cables on the Can bus.
- – Examining the ground wire and electrical connection to the PCM and correcting any problems.
- – Replacing a faulty relay or blown fuse
- – Replacing the defective LCD screen
- – Repair or reprogramming of the faulty PCM (rarely).
How Serious Is the P0644 Fault Coding?
These serial data communication codes should not be used with any security or driving issues. A P0644 code could result in the loss or corruption of the driver display. While not considered to be serious, it should be detected and repaired immediately.
