Question about 2001 Buick Regal

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ABS, Service Vehicle, Tracking lights on

What to do?
Someone said me that I need to replace VSS (Vehicle speed sensor).
Another opinion that it can be related with wheel bearing (hub assembly) so as all possible light on: anti lock brake, brake, traction control light and service vehicle soon

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  • garvard Nov 12, 2009

    Not yet. In addition I would like to say that speedometer is working normally but odometer doesn't work

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  • Master
  • 819 Answers

Have you had this car scanned for codes? wheel bearing problems are problem, but get it scanned rather than throwing parts in it so many possibilities.

Posted on Nov 12, 2009

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Posted on Jan 02, 2017

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04 f150 heritage speedo moves but not over 10 mph and trans won't shift gears. i changed all sensors,traced all wires.


taking your vehicle to a qualified reair shop to have it diagnosed would be a good thing to do . You could not have traced all wires ! Because i'm sure you haven't any idea how this works . An a factory scan tool is a must to diagnose this .Do you know what ford SCP data network is ?
Speedometer
The instrument cluster receives the vehicle speed signal from the powertrain control module (PCM) over the standard corporate protocol (SCP) network and displays it on the speedometer gauge. If the instrument cluster receives no vehicle speed signal after one second, the speedometer defaults to 0.0 km/h (0.0 mph).

Vehicle Speed Sensor
The vehicle speed sensor (VSS) (Figure 52) is a variable reluctance or Hall-effect sensor that generates a waveform with a frequency that is proportional to the speed of the vehicle. If the vehicle is moving at a relatively low velocity, the sensor produces a signal with a low frequency. As the vehicle velocity increases, the sensor generates a signal with a higher frequency. The PCM uses the frequency signal generated by the VSS (and other inputs) to control such parameters as fuel injection, ignition control, transmission/transaxle shift scheduling and torque converter clutch scheduling.

P0500 - Vehicle Speed Sensor (VSS) Malfunction Indicates the powertrain control module (PCM) detected an error in the vehicle speed information. Vehicle speed data is received from either the vehicle speed sensor (VSS), the transfer case speed sensor (TCSS) or the anti-lock brake system (ABS) control module. If the engine RPM is above the torque converter stall speed (automatic transmission) and the engine load is high, it can be inferred that the vehicle must be moving. If there is insufficient vehicle speed data input, a malfunction is indicated and a DTC is set. On most vehicle applications the malfunction indicator lamp (MIL) is triggered when this DTC is set.
  • Open in the VSS+/VSS- harness circuit.
  • Open in the TCSS signal or the TCSS signal return harness circuit.
  • Short to GND in the VSS harness circuit.
  • Short to GND in the TCSS harness circuit.
  • Short to PWR in the VSS harness circuit.
  • Short to PWR in the TCSS harness circuit.
  • Damaged drive mechanism for VSS or TCSS.
  • Damaged VSS or TCSS.
  • Damaged wheel speed sensors.
  • Damaged wheel speed sensor harness circuits.
  • Damage in the module(s) connected to the VSC/VSS circuit.
  • Open or short in the vehicle speed circuit VSS signal between the ABS VSS signal output and the VSS signal inputs to the PCM and other modules (Excursion and F-Super Duty).
Monitor the VSS PID while driving vehicle. This DTC is set when the PCM detects a sudden loss of vehicle speed signal over a period of time. If vehicle speed data is lost, check the source of where the vehicle speed input originates from: VSS, TCSS or ABS. Note: On some MSOF applications, VSS and TCSS PID can be monitor. However if no TCSS PID is available and VSS PID is zero, TCSS circuitry frequency must be checked for loss of sensor signal. If another vehicle electronic module has generated the P0500 and the vehicle does not receive its vehicle speed input from one of the above mention sources (VSS, TCSS or ABS). Check the PCM for Output Shaft Speed Sensor (OSS) DTCs. On OSS applications the PCM uses the OSS to calculated the vehicle speed. If no OSS DTCs are found check for correct PCM configuration. Check PCM configuration for correct tire size and axle ratio. P0501 - Vehicle Speed Sensor (VSS) Range/Performance Indicates the powertrain control module (PCM) detected an error in the vehicle speed information. This DTC is set the same way as P0500, however the malfunction indicator lamp (MIL) is not triggered.
  • Refer to possible causes for P0500.
Refer to Diagnostic Aids for P0500. P0503 - Vehicle Speed Sensor (VSS) Intermittent Indicates poor or noisy VSS performance. Vehicle speed data is received from either the vehicle speed sensor (VSS), the transfer case speed sensor (TCSS), or the anti-lock brake system (ABS) control module.
  • Noisy VSS/TCSS input signal from the radio frequency interference / electro-magnetic interference (RFI/EMI) external sources, such as ignition components or the charging circuit.
  • Damaged VSS or driven gears.
  • Damaged TCSS.
  • Damaged wiring harness or connectors.
  • Malfunction in the module(s) or circuit connected to the VSS/TCSS circuit.
  • After market add-on.
Monitor the VSS PID while driving the vehicle. Check for intermittent vehicle speed indication. Verify the ignition and charging system are functioning correctly.

Mar 25, 2017 | Cars & Trucks

1 Answer

Need help locating vss on trans for a 2000 F350 4X4 7.3 motor


1. Your ABS/ VSS can be removed and cleaned with just a clean rag, no need for wd-40 or any other solvent, also carefully clean out the hole on top of the differential, lift the vehicle (place in neutral) and check the sprocket wheel inside the pumpkin for possible missing teeth or to see if it is loose.

2. The VSS (part # F85F-9E731-AA) can also be tested with an ohms meter, it should measure ~1.9 K-ohm or higher (lower than 1.9 requires replacement).

3. The VSS is a hall-effect sensor, connect a volt meter to the sensor connector and wave a piece of metal (pair of pliers or flat metal) about a half inch away from the sensor, and you will consistently see a variation in voltage, if no movement on the volt meter is observed, replace the sensor.

4. You also have the two front wheel ABS sensors, try cleaning them first, and carefully reinstalling them.

5. When the VSS sensor is malfunctioning, the PCM may try to get input from the TSS (turbine speed sensor, top of the transmission), and as it turns out, the same return wire is used by the OSS (output speed sensor, tail end of transmission), check these two sensors also, clean them and test them (1.10 K-ohm or higher). These are also Hall Effect sensors, so check for voltage as described in paragraph 3 above.

6. Pay attention to see if your ABS light blinks when you start the vehicle, just before it stays solid. If this is happening, count the number of blinks, as this is actually a code and the blinking means the vehicle is trying to communicate with you.

7. Last, if nothing above corrected the problem, I would start tracing RFI (radio frequency interference), one sure area is usually your fuel pump (wires running along side VSS wiring. ABS/VSS wiring is routed directly to the ABS module.

I hope this information works for you.


There are two "speed sensors" though that can be confused at the parts store. They don't look the same but they are listed almost the same. The one on the rear diff is listed as the "ABS speed sensor"....the one on the tranny is listed as the "Speed sensor" The rear one is the cheapest and easiest to replace...about $12.

Feb 24, 2013 | Ford F-350 Cars & Trucks

1 Answer

I have a 2005 Altima 2.5 94k miles and service engine light stays on. Trouble code stated that vss needs replacing. Where is it located. The car dies at any speed. help.


It is a vehicle speed sensor.It will cause many various problems other than your issue but definitely is what is causing yours.I am not familiar with all makes and models so I am including a link to assist you.The link is actually a google search page which I set up for you and includes locations and images.The first couple actually are links back to this site,but the others will be much more helpful.Good luck,Greg There is also a Nissan forum,but relates more to an ABS problem someone posted,although ABS could also be affected.

http://www.google.com/search?sourceid=navclient&aq=0&oq=vss&ie=UTF-8&rlz=1T4GGLL_enUS352US353&q=vss#sclient=psy&hl=en&rlz=1T4GGLL_enUS352US353&q=vehicle+speed+sensor+on+a+nissan+altima+2005&aq=&aqi=&aql=&oq=vehicle+speed+sensor+on+a+nissan+altima+2005&pbx=1&fp=10ed5043a6013aa8

Feb 14, 2011 | 2005 Nissan Altima

1 Answer

Where is the location of the speed sensor on the 1999 v10 triton f250? Why does my speedo not work?


VSS Sensor The Vehicle Speed (VSS) Sensor input is used by the PCM to determine vehicle speed. The VSS generates a signal that increases in frequency proportionate to vehicle speed. The PCM has a base frequency stored in memory for a distance of one mile. By comparing the input and stored value, the PCM calculates vehicle speed.
VSS types include: photo-optic, permanent magnet generators or hall effect technology. The PCM may use other sensors on the vehicle (ABS Wheel Speed) to validate VSS operation.
VSS information is used to calculate vehicle loads including: torque converter application, cruise control, fuel cutoff/speed governance strategies, instrument panel speedometer and more.
Modified drivetrain components such as final gear sets and/or tires can alter VSS input values to the PCM. Improper signals can alter Torque Converter Clutch (TCC) application, shift points, cruise control operation as well as many other systems relying on vehicle speed input.
Typical VSS comp-00-00-636.gif

WARNING
To avoid personal injury and/or vehicle damage, refer to the service precautions at the beginning of this section.

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The Speedometer may not work due to a break in the wire for the VSS, or a bad VSS or a bad instrument cluster.

Oct 08, 2010 | Ford F-250 Cars & Trucks

1 Answer

ABS light has come on and speedometer not


It probably only needs a new VSS (vehicle speed sensor). Since the ABS uses the wheel speed and vehicle speed to determine ABS operaton, is makes sense that the ABS light is on if the VSS failed. The computer also uses the VSS to operate your speedometer.

The speed sensor will be about $40-70 for a manual transmission and about $70 for the automatic transmission. You'll find the speed sensor in the transmission near the CV axles. It is likely you'll be able to reach it yourself and that'll save you money and a trip to the shop.

Mar 04, 2010 | 2001 Ford Focus

1 Answer

Speedometer and taq not working. and abs light came on at same time for a 1999 ford windstar 3.0. all stoped working and the abs light came on at same time.


If your speedometer is not working, that means your Vehicle Speed Sensor or VSS for short, needs to be replaced. The ABS light means your ABS sensors need to be replaced. There are 4 ABS sensors: Front driver's side, Rear driver's side, Front passengers side, and Rear passenger's side. Once you replace your VSS, it will start communicating with your transmission again, and the speedometer will kick in. Hope this helps.

Jan 25, 2010 | 1999 Ford Windstar

1 Answer

My 1996 S-10 Blazer will not shift sometimes and the ABS light comes on. This problem goes away after I drive it for awhile. The code I get is P0502 (vehicle speed sensor low imput). Would a bad speed...


A faulty VSS (Vehicle Speed Sensor) or related wiring can cause both of your problems, trans and ABS. If the computer doesn't know the vehicle is moving, then it won't shift the trans. If the ABS controller sees wheel speed, but not vehicle speed, it will turn on the ABS light. The VSS is located in the rear transfer case housing. But remember, it may be the VSS, related wiring, a faulty speedo buffer (usually located in the dashboard), ECM, or even the reluctor on the transfer case output shaft. You may want to have a shop scan "data stream", or even have them diagnose the problem.

Jul 07, 2009 | 2000 Chevrolet Blazer

1 Answer

Speed sensor on 2000 ford f150 4x4 triton 4.6


if this helps, please rate as fixya. thanks.

Vehicle Speed Sensor The vehicle speed sensor (VSS) (Figure 43) is a variable reluctance or Hall-effect sensor that generates a waveform with a frequency that is proportional to the speed of the vehicle. If the vehicle is moving at a relatively low velocity, the sensor produces a signal with a low frequency. As the vehicle velocity increases, the sensor generates a signal with a higher frequency. The PCM uses the frequency signal generated by the VSS (and other inputs) to control such parameters as fuel injection, ignition control, transmission/transaxle shift scheduling and torque converter clutch scheduling.


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For the 4R70W trans vehicles

Vehicle Speed Sensor (VSS)

The vehicle speed sensor (VSS) is model dependent. Possible sources of vehicle speed input are, anti-lock brake sensor (ABS), a gear-driven vehicle speed sensor (VSS), or the transmission output shaft speed (OSS) sensor. On 4x4 applications with a manual shift transfer case, the transfer case speed sensor is the source of vehicle speed. The VSS signal is either an AC signal whose frequency changes with vehicle speed, or an SCP data message depending on the source. Some vehicles have both. The vehicle speed signal is an input to various vehicle sub-systems such as the powertrain control module (PCM), instrument cluster (speedometer and odometer), speed control systems, etc. The vehicle speed source must be operational to enter output state control mode for diagnostics.

If you have a 4R100 trans, it is different.

Mar 12, 2009 | 2000 Ford F150 Flareside SuperCab

1 Answer

Durango ABS


ok first replace the wheel speed sensor on top of the rear axle. if that does not work replace the vss on the transmission. vss vehicle speed sensor good luck

Nov 23, 2008 | 1998 Dodge Durango

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