Skip the auto shop - Our mechanics make house calls

Q: Won't Shift into drive

asked by on

Our G20 van has been sitting from 13-19 months. The alternator was bad, but it would run and drive fine. It’s just the battery that wouldn’t charge. We took it to the repair shop to fix the alternator, but now it won't go into drive. It only works in first or second gear. The speedometer doesn't work and the ABS light is on part of the time. We did some testing before now and the Vehicle Speed Sensor on the transmission tail shaft measures 1150 Ohms in a cool 60 degrees Fahrenheit shop. I counted 36 codes and 36 flashes. I disconnected the battery a few times. We think maybe it’s the VSS buffer and DRAC or the wiring going from the buffer to the VSS. The brake lights works so we don't think it’s a fuse problem. I don't think it’s an internal mechanical problem because it worked OK the last time it was parked. There are no signs of the wires being chews by mice. Do you know where the buffer is located? What are your thoughts and ideas on the other problems?

A: The VSS (vehicle speed sensor) buffer is lo...

The VSS (vehicle speed sensor) buffer is located on the drivers side near the ECM. I have heard of instances where the connector between the VSS and the buffer has become disconnected. The wiring between the VSS and the buffer should be traced to see if this is the issue. With the bad VSS signal, gear shifts and speedometer operation will not be possible. You may want to enlist the help of a mechanic, such as one from YourMechanic, who will have the tools and expertise to diagnose the shifting issue.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Odometer stopped working 1994 Chevrolet K2500

Hello - your truck has a digital instrument cluster. It is possible that either a speed sensor, or something in the clusters electrical components is failing. (These are notorious for failures) There are rebuilders for these clusters who can offer...

Q: Car shook and quit running

White smoke is generally an indication of rapid coolant boil off and loss. Now this may something as minor as a coolant leak from a blown hose or gasket. but it could be something as major as a cracked block...

Q: Car sat for years, trouble starting - 1971 Nissan 240Z

Hello. It sounds like the fuel pump is bad or the fuel filter is clogged. It is also possible that there is a lot of water in your fuel system. Dry gas or sea foam will need to be used...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...