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What does code 42 VSS circuit mean? I took it to schucks and had them hook it up to read the code it gave me code 42 vss circuit what does that mean is wrong/

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Speed sensor malfunction

Posted on Oct 06, 2010

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Go to the dealer or to an Auto Zone to see if the codes are in the repair manual for your year of Geo. depending on the year Geo, as to which computer system you have, OBDI, or OBDII.

Posted on Oct 06, 2010

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Speedometer won't work in 97 Astro, replaced sensor..help


What sensor ? VSS - vehicle speed sensor on the transmission ? Colud be the speedometer gauge is bad . Do you know how the insturment cluster get's that info. ? Your best bet , take it to a qualified repair shop . You have no idea how it works , don't have the diagnostic tool's to find the problem ,so do yourself a favor . The first step would be to hook up a factory or professional type scan tool to see if the VSS info is seen in the VCM ,then to see what the VCM is sending over the serial data network . Do you know what a serial data communication network is ? VCM is vehicle control module .
Speedometer and Odometer Circuit Description
An electronic speedometer is standard equipment on all models. Integrated circuits control the air core speedometer and the stepper motor odometer. Removable bulb and socket assemblies provide the lighting. The socket assembly inserts into the back of the instrument cluster.
The speedometer system consists of the following components:
• The instrument cluster
• The vehicle speed sensor (VSS) calibrator
• The VSS
• The related wiring
The VSS calibration is part of the VCM that changes the analog output from the VSS to a digital signal. The digital signal contains 4000 pulses per mile (PPM) for the instrument cluster. The VCM sends the signal to the speedometer through CKT 389. The VSS calibration matches to the final drive and the tire size of each vehicle. Reprogram the VCM with the proper VSS calibration if the final drive or tire size changes for any reason. The signal will not be accurate for the proper speedometer/odometer operation if the necessary change is not made. An incorrect VSS calibrator can also affect the following components:
• The antilock brakes
• The vehicle control module (VCM)
The cruise control systems
The VSS calibration is programmed into the VCM. Do not service the VSS calibrator separately.
The VSS is a permanent magnet signal generator that sends an analog signal proportional to the propeller shaft speed to the VCM. The VSS mounts to the transmission tailshaft extension housing on the two-wheel drive model. The VSS mounts to the transfer case output shaft housing on the all-wheel drive models.


Use a Scan Tool in order to read the vehicle control module (VCM) diagnostic trouble codes.
Are there any vehicle speed sensor related trouble codes?
Testing an not guessing fixes problems

Sep 19, 2017 | 1997 Chevrolet Astro

1 Answer

94 Lexus gs300 sets code 42 (back up speed sensor) changed, cleared, several cycles later back on.


Code 42 Vehicle speed sensor circuit fault. What this means is that the circuit has a problem, that can be the VSS or it can be anywhere in the wiring or even the ECM module. You need a scanner to directly see what is going on with the speed sensor signal output. That means a trip to a dealer or well equipped shop that has the correct scanner and knows Lexus repair.

Feb 17, 2017 | Lexus Cars & Trucks

1 Answer

2003 Grand Marquis digital speedo only reads "0". All other displays read correctly. Could it be the speed control? If so, where exactly is it located?


The speedometer provides speed information based on a speed/distance pulse signal from the vehicle speed sensor (VSS). The VSS is mounted on the speedometer driven gear in the transmission.
or the gauge is bad .
  • The speedometer/odometer is inoperative
  • CJB fuse 14 (10A).
  • Vehicle speed sensor (VSS).
  • Circuitry.
  • Instrument cluster.
  • Go To Pinpoint Test E .
PINPOINT TEST E: THE SPEEDOMETER/ODOMETER IS INOPERATIVE CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
CONDITIONS DETAILS/RESULTS/ACTIONS E1 CHECK VSS SPEED SIGNAL BETWEEN CIRCUITS 679 (GY/BK) AND CIRCUIT 676 (PK/OG)
VSS C1088
Raise the drive wheels off the ground. While rotating the driveshaft, measure the AC voltage between the VSS C1088 pin 1, circuit 679 (GY/BK), component side and the VSS C1088 pin 2, circuit 676 (PK/OG), component side.
  • Is the voltage between 1.3 volts AC to 6.1 volts AC?
Yes GO to E2 .

No CHECK and INSPECT the speedometer drive gear. INSTALL a new VSS if the speedometer drive gear is OK. TEST the system for normal operation E2 CHECK CIRCUIT 679 (GY/BK) AND CIRCUIT 676 (PK/OG) BETWEEN THE INSTRUMENT CLUSTER AND THE VSS

Dec 03, 2016 | Cars & Trucks

1 Answer

Test ignition coil


Get a new VSS and replace the old one.

Feb 14, 2014 | Volvo 850 Cars & Trucks

1 Answer

Ihave nissan quest 2005,have code p0500,but this transmission have two sensors,Im no sure what the speed sensor


code p 0500 refers to vehicle speed sensor(VSS)--circuit malfunction===causes --wiring VSS---ECM
it has only one VSS and if the wiring is good with good connections replace it
there are other sensors in the transmission so don't confuse them with a VSS

Aug 25, 2013 | Cars & Trucks

1 Answer

1996 honda accord o2 sensor versus Catalytic converter codes p0135 and p0141


The fault code P0135 means O2 Sensor Heater Circuit (Bank 1 Sensor 1)
The code P0141 means O2 Sensor Heater Circuit (Bank 1 Sensor 2)

Launch X431 Connector

Aug 22, 2012 | 1996 Honda Accord

1 Answer

Will not shift into overdrive?


Hook up your On-Board Diagnostic (OBD) Reader and read the Diagnostic Trouble Codes (DTC's). Mine was P0500: Vehicle Speed Sensor (VSS) malfunction. After VSS replacement, all was fine.

Dec 03, 2010 | 1999 Lexus RX 300

2 Answers

I have a 94 4runner and I ran the diagnostic and its a 42 code for the OD/off and engine 42. It doesn't shift into over drive sometimes and it'll blink OD/off every now and then, and the speedometer...


Hi,

Code #42 on the 4Runner denotes a problem with the Vehicle Speed Sensor (VSS) circuit.

It means the ECM did not detect a signal from the VSS, above 2,200rpm....which might explain the speedo issue - Does your speedo play up, only when engine running above 2,200rpm or 2,700rpm?

Areas to check (in this order) are:

- Open (or short) in the VSS circuit
- faulty VSS sensor
- ECM fault within VSS circuit


Cheers,

"If this has helped you, please rate this solution" :-)

Jan 27, 2010 | 1994 Toyota 4Runner

1 Answer

Obd1 trouble code


25) is mixture control continuously lean
42) is VSS circuit - vehicle speed sensor
43) is starter signal circuit
Good luck and I hope this answers your question. And remember to rate all the solutions that you get, thanx.

Oct 30, 2008 | 1995 Toyota Camry

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