need to get the security code from a licensed Volvo repair. code is by VIN.
go to your local Volvo dealer, there is a recall or fix for that at no charge!
A leaky mass airflow sensor or it can be a leak in the air intake hose.
Fix the problem and the light will go out. Normally on Volvo 850's the ABS sensor goes out (actually a wire comes loose inside the unit) this sensor is under the hood on the ABS unit.
Squealing can come from a number of things. But usually, its a bad ground connection from the radio or either the antenna needs a better ground.
Loose ground wire or bad ground.
AM radios are based on the principle of sound waves being sent through the air. If the AM radio station has static, you may wish to move to a new area where reception is better.
The OFF code on your Volvo radio stays on after the user has entered the wrong radio code three times or more. OFF actually means On but is in locked mode. To reset this problem so that you can re-enter your correct code, you must leave the radio on showing "OFF" for two hours, sounds ridiculous but its true, just did it myself last night. Make sure you have correct radio code, if not sure, call Volvo and they most likely will give it to you over the phone, just have your vehicles vin number handy. One last note, keep ignition in first accessory position while keeping raido powered for two hours. Once your radio is left on for two hours, CODE should appear, then just enter the four digit code and youre back in business:)
The only way to fix the Volvo-503 code is to take it to the dealership and have them fix it for you.
the relay needs to be replaced. you will find it behind the hazard switch (attached to the switch - a long skinny thing) I looked forever till someone told me where it was. Even the Volvo parts guy didn't know and Lawrence Volvo of Walnut Creek, CA would not tell me...
I'm am afraid to report that you need a new unit - ask your dealer about a refurb unit.
I'm am afraid to report that you need a new unit - ask your dealer about a refurb unit.