An expert who has achieved level 3 by getting 1000 points
An expert who has finished #1 on the weekly Top 10 Fixya Experts Leaderboard.
An expert that got 20 achievements.
An expert that got 10 achievements.
Re: volvo speed sensor
Do a continuity test from the speed sesor harness connector to the PCM (computer), do both wires. if these show no loss of connection then pull the sensor (at the transmissiom) and make sure the gear that drives it is ok, if that checks out replace the sensor.
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US. click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need. Goodluck!
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
The speed sensor or crank sensor as called by other vehicles is on the rear pass side. Follow a black wire that looks like a spark plug wire. It has a connector and 1 bolt where it attaches near trans. Well known for failing and no spark.
The tracs off light comes on automatically whenever the ABS light goes off. Each of 4 wheels has an ABS sensor. The ABS light usually comes when any one of these sensors go bad. It could also be the ABS computer but the computers usually last the lifetime of the car on Volvos. Then, of course it could be some wire spliced somewhere in the ABS circuit and that would be something very difficult to find where the short is. But try the sensors, they are usually the culprit.
sounds like a bad speed sensor, if sensor doesnt tell computer what speed your traveling then trany doesnt know what gear to select, try replacing speed sensor, that should solve your problem,im suprised check engine light didnt come on, anyway good luck hope this helps.
This is not a cable system. You will ned to get a scanner to see if maybe the speed sensor is bad or a code is stored to diagnose. It could be a bad sensor, broken wire, or the instrument cluser may be bad.
Volvo Radiator, Thermostat and Sensors
system's temperature controls include all coolant temperature sensors,
Volvo thermostat, Volvo radiator or expansion tank cap, cooling fan(s)
and fan clutch (if equipped). These cooling system parts function
primarily independent of the engine but control the engine either
through cooling or by sending control signals to your Volvo's
The Volvo thermostat is a spring-loaded
valve that opens and closes based on the temperature of the coolant
flowing through it. A high temperature reading followed by a drop to
normal temperature (or a continuously low temperature) is a common
first sign of a sticking Volvo thermostat. However, many other
conditions may cause these symptoms, so you need to know how to
eliminate each possibility.
The Volvo radiator or expansion
tank cap is also a spring-loaded valve reacting to system pressure. It
serves to maintain proper system coolant level at predetermined
pressures. It must always be replaced with an exact replacement cap
with the same pressure setting. Never use other caps except for
A belt-driven fan blade for pulling
air through the Volvo radiator is usually on the Volvo water pump
pulley and should have a fan clutch to control it. The fan clutch
allows the fan to turn with the belt at low engine speed and
"free-wheel" at higher speeds. A bad fan clutch either doesn't allow
the fan to spin at low speed (overheating in traffic) or doesn't allow
it to free-wheel at high speed (potential overheating on highway or
reduced gas mileage).
An electric fan can be either by
itself (usually front-wheel drive) or auxiliary (used with a mechanical
fan). Both types are controlled via a temperature sensor - in the Volvo
radiator or upper Volvo radiator hose or on the Volvo thermostat or
Volvo water pump housing. This sensor is usually an on/off type switch
with a fixed temperature setting. (Some vehicles may have 2-3 settings
for multi-speed fans.) This sensor is commonly called an "auxilliary
Other common temperature sensors are: 1) gauge
sender (variable output); 2) warning light sender (on/off type); 3)
lambda and/or fuel injection sensor(s) (variable to control fuel
injection settings); 4) thermo-time switch (cold start valve control).
Your Volvo may have other sensors as well.
control is critical to both performance and emission control.
Unfortunately, this system is the most difficult to troubleshoot
without proper equipment and diagrams. It's even more difficult with
computers that adjust timing, idle speed, vacuum and fuel delivery
automatically to make up for potentially faulty temperature sensor
Maintenance of your cooling system sensors is
virtually impossible since there's nothing really to "maintain".
Keeping them clean both internally (coolant replacement) and externally
(engine cleaning) is the best way to ensure trouble-free driving.
Checking and replacing all parts at the factory-recommended time or
mileage limits helps as well
if your speed sensor is not working ,thats mean your odometer is not gonna work.try to take off your sensor and spin it ,while somebody looking at it,it suppose to move when you spin it,usually if the odometer stop working you gonna need a new/used one,