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Showing posts with label sensor. Show all posts
Showing posts with label sensor. Show all posts

Friday 3 July 2015

volvo v70 2002 is showing the warning 'abs/anti-skid service reqd'

volvo warning 'abs/anti-skid service reqd'





volvo v70 2002 is showing the warning 'abs/anti-skid service reqd', also the driver side front wheel makes a screeching sound not unlike worn down pads on discs when making a right or left
The vehicle has done 170k miles and I replaced the water pump and belts in March 2011. However, I did not refit the plastic inner wing till Nov of 2011. Could this have anything to do with noises and warnings I am now receiving. I guess I am keen to know if the problems are wheel speed sensors or ABS/ECU issues.


Get that car Jacked up and pull the wheel and do a very close inspection. It could be any thing from a rock in the Caliper, to loose wheel bearings to bad brake pads to a bad CV Joint.Inspect for where there is any fresh wear or grind marks on your suspension to check for integrity. Also if you have run over a piece of wire it could be wrapped up int he CV axle.

Inspect the brakes/suspension first. If pads and suspension are ok then have the ABS system scanned for faults. You have either a bad wheel speed sensor activating the ABS or a bad ABS module. Volvo has lots of issues with this. The ABS/Tracs control module has solder joints that go bad in the control module 99% of the time it is the issue. Have the module repaired/replaced.


any noise coming from the front wheel while turning leaves me thinking front constant velocity joint if the car is front wheel drive. With the abs light on I would take down the front driver side wheel and check the brakes for wear along with the front wheel bearing assembly for play or loosness, Check for the sensors to make sure they havent came off and are rubbing your rotors as you make your turn. It can be a number of things. Usually when its the front constant velocity joint it makes a popping noise as if something is binding. As for the front wheel bearing assembly it could make noises usually after the car has been ran down the road and heated up the bearing then it will sing to you. But as you mentioned about the noise only during turning I would lean towards constant velocity joint or sensor hanging and rubbing the rotor, Its only one way to find out. Hope this helps.




Saturday 22 March 2014

Throttle position sensor noisy

Problem with Harley Davidson FLHTCUI Electra Glide Ultra Classic Motorcycles


Just had a set of Vance and Hines true duel pipes fited and a high flow HD air filter along with a retune using a screaming eagle race tuner problem is that now what sounds like the throttle position sensor is very noisy when i turn the ignition on ( sounds like it is going to full on and back to off ) , is this due to the retune , the lack of the original air filter back or is the position sensor on the way out . The bike seems to running ok starts well and definatly has more low to mid range power and the bonus of better fuel economy , the engine fault light and security light both go out after the prescribed 4 secs so there seems to be no faults , bike is a 2007 FLHTCU .

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Saturday 18 May 2013

Pontiac Grand Prix GT: 1997 Pontiac Grand Prix 3.8L no cooling


1997 Pontiac Grand Prix 3.8L no cooling fans unless A/C is on.

Country: United States
Make: Pontiac
Model: Grand Prix GT
Year: 1997
Engine: 3.8l

Already Tried:
Unplugged coolant temp sensor next to thermostat, and the fans did not come on even then. Will only come on with A/C.



Does the check engine light come on with engine running?
How hot does the engine get if idling without the a/c on?


Customer replied2 days and 17 hours ago.
The engine gets warm, but I wouldn't say hot. It doesn't have a gasket problem. No CEL.

Expert:  Dave Nova replied2 days and 17 hours ago.

Fans should of course come on when the coolant sensor is unplugged. Fans also come on when the temperature reaches 225-228 degrees. Does the engine reach that temperature range or more?


Customer replied2 days and 17 hours ago.
Well, see, that's what I thought. That's why I unplugged it, but they didn't come on. And they DO run with the A/C on, which is weird, so I'm not inclined to think it's the motors obviously. The temp gauge does, but I don't know if it is accurate or not. I can shoot it.

Expert:  Dave Nova replied2 days and 17 hours ago.

Let's see what the actual temperature reading gets up to and go from there.


Customer replied2 days and 16 hours ago.
Ugh, hold on. My mechanic did not turn the vehicle ON, just to the on position. When ON, and the sensor is UNPLUGGED, they run. So it's the sensor, right?
Accepted Answer


Expert:  Dave Nova replied2 days and 16 hours ago.

That would be correct. If the fans come on with the sensor unplugged and the engine running then the computer, relays, fan motors, and wiring are all okay and this would indicate a problem with the sensor. Fans still will not come on until 225-228 even with a good sensor installed.