Auto Veteran - B0001 - PCM Discrete Input Speed Signal Error
Auto Veteran
Login Register

B0001 - PCM Discrete Input Speed Signal Error

Automotive Engineering Diagnostic Trouble Codes
1 year ago
3009 views
0 comments
2 mins read
Auto Veteran
Auto Veteran
Updated on Dec 03, 2024

B0001 is a code that tells you there is something wrong with the speed signal. The speed signal is used by the computer in your car (PCM) to know how fast your car is going and other important things.

The speed signal can come from different places, such as the vehicle speed sensor, wheel speed sensors, and the ABS module. The PCM checks the speed signal and compares it to other sensors to know the speed and other important things.



If the PCM finds a problem with the speed signal, it will set B0001. This code can be because of:

  • A bad vehicle speed sensor
  • A bad wheel speed sensor
  • A bad ABS module
  • A problem with the wires or connectors for the vehicle speed sensor, wheel speed sensor, or ABS module
  • A problem with the PCM


Some signs that you have B0001 are:

  • Your check engine light is on
  • Your speedometer does not work
  • Your cruise control does not work
  • Your transmission shifts badly
  • Your engine runs poorly


To fix B0001, you need to do these steps:

  1. Check the vehicle speed sensor and wheel speed sensors for any damage or wear. If they are bad, replace them.
  2. Check the voltage in the speed signal circuit. If the voltage is too low, there may be a broken wire or connector in the wires.
  3. Check the PCM for any damage or corrosion. If it is bad, replace it.

The cost to fix B0001 depends on what is causing it. If the vehicle speed sensor or wheel speed sensor is bad, it may cost around $100-$200 to replace it. If the ABS module is bad, it may cost around $300-$500 to replace it. If there is a problem with the wires or connectors, it may cost around $50-$100 to fix it. If the PCM is bad, it may cost around $500-$1000 to replace it.

Unfortunately you cannot prevent B0001, but you can help your vehicle speed sensor, wheel speed sensors, and ABS module last longer by keeping your engine oil clean and at the right level.

B0001 is a code that means there is a problem with the speed signal. This can cause your car to run badly and use more gas. If you have this code, you should have your car checked by a mechanic.

Don’t forget to share it
twitter

Please login to leave a comment.... Login Here

Read also

  • Car Cranks But Won’t Start? Don’t Guess - Read This First

    According to a recent study by the American Automobile Association, nearly 1 in 4 car breakdowns can be traced back to starting problems, with battery-related issues accounting for 42% of those service calls. That's millions of frustrated drivers standing beside silent vehicles each year!

    1 week ago
    1505 views
    17 mins read

  • Car Warranty Secrets: What Dealers Don't Want You to Know

    In 2023, Americans collectively spent over $37 billion on extended car warranties, with profit margins for sellers reaching an eye-watering 70%. Yet research shows only one in ten warranty holders ever use their coverage.

    1 week ago
    1792 views
    14 mins read

  • Diesel Particulate Filter (DPF) Cleaning: DIY vs. Professional Costs

    Every year, diesel vehicle owners collectively spend millions replacing DPFs that could have been saved through proper maintenance. A staggering 58% of premature DPF failures could be prevented with correct cleaning procedures.

    1 week ago
    2126 views
    14 mins read

  • How to Rebuild a Car Battery (Is It Worth the Effort?)

    Car batteries don’t last forever, but what if you could squeeze more life out of yours? The average battery lasts just 3–5 years, yet rebuilding one can cost half the price of a new one. Sounds tempting, right?

    1 week ago
    1738 views
    12 mins read
Top