What is the P0608 fault code What is the description of Control Module VSS Output “A” Failure? How do you fix the P0608 fault code What are the causes and symptoms of the P0608 error code?
What is the P0608 Fault code? What does it all mean?
A code P0608 will be issued if the powertrain control module, PCM, detects a malfunction of the vehicle speed sensor’s output voltage signal. This particular VSS output circuit can be labeled “A” . For more information, refer to the vehicle-specific repair manual. “A” circuit or component.
OBD-II diagnostics systems can be equipped with up to seventy control modules onboard vehicles. These modules communicate with each others via the controller network (CAN). The VSS, an electronic sensor transmitting a voltage signal and providing information about vehicle speed to one or more other modules, is called the controller area network (CAN). The VSS is usually located near the differential or output shaft, or near the transmission. This sensor calculates the speed of your vehicle. This sensor’s information is what determines the speedometer and odometer.
A number of systems directly affect the vehicle’s speed. The proper functioning of these systems can be affected by any malfunction or interruption in vehicle speed. Vehicle speed has an obvious effect on various equipment like the anti-lock braking system, cruise control, entertainment, and climate control system. The cruise control module monitors vehicle speed and adjusts to maintain the desired speed. Auto volume entertainment systems make use of vehicle speed to adjust volume to compensate road and wind noise. These systems all use the voltage signal of the VSS sensor for vehicle speed calculations.
The VSS typically sends vehicle speed information as a voltage signal (TCM) to the PCM. This information is shared with other modules by CAN. Fault code 0608 is created if any other modules are unable to receive a VSS or an inconsistent VSS message. Other modules that can detect and store this error code include the transmission control, body control, turbo control, anti theft system control, anti-lock brake controller, and fuel injector control modules.
Vehicles susceptible to the P0608 fault code include but aren’t limited to various models of Volkswagen and Mitsubishi, Renault, Ford Mercedes-Benz, Citroen GMC, Peugeot Alfa Romeo Chevrolet, Hummer, BMW, Toyota, and Mercedes-Benz.
What is the P0608 Fault Code?
Here are some reasons why P0608 should be set.
- – Defective vehicle speed (VSS) sensor
- – The VSS sensor harness wiring may be worn, damaged, or shorted.
- – Faulty, rusty or poor electrical connections/connectors
- – Low system voltage/weak battery
- – Incorrectly or defectively programmed PCM
What are the symptoms for P0608 Malfunction Codes?
These symptoms may be present in vehicles with code P0608.
- – Illumination for the check engine light
- – An irregular or faulty speedometer
- – Faulty odometer
- – Incorrect, irregular, harsh, delayed, or inaccurate gear changes
- Cruise control system issues
- – Slow acceleration
- Fluctuations in idle speeds
- – There are two types of malfunction lights: Anti-lock Braking System (ABS) or Traction Control System (TCS).
- – Other fault codes can be set
How to Fix the P0608 Fault Code
When code P0608 has been set, other fault codes may be triggered. These codes can relate to engine misfire codes as well as fuel injector codes, transmission code, and many other codes. It is common for mechanics to not pay attention and fix P0608 codes. It is actually the P0608 fault code, not other codes, that causes them to appear. If the P0608 fault is corrected and diagnosed, then other codes will be cleared up.
Some of the possible repairs that can resolve the P0608 fault code may include:
- – Repair and replacement of damaged wires, loose connectors, and rusty connectors for speed sensors
- – Replacing a defective vehicle speed sensor (VSS).
- – Replacing a weak or defective battery
- – Replacing the defective PCM
- – Test and replacement, if needed, of control modules
How serious is the P0608 Fault code?
When the code P0608 is set, your vehicle may have a number of issues that can cause problems with driveability until it is fixed. VSS-related codes impact transmission shift strategy as well as engine driveability. You will have more problems and higher repair costs if the code is not addressed immediately. This code must be taken seriously and addressed immediately.
