Hey guys was hoping to get some help with an issue with a code that keeps tripping my check engine light I believe it is 0058 high voltage in brake system does anyone know how to fix the problem this is a 2005 XC90 t6

 

Isn't a po0058 code related to an o2 sensor heater?

Modern o2 sensors have preheaters in them so they will get to operating temp faster. The engine control unit monitors the current used by the heaters. If the current used is not normal - that code is set. Usually it's an open circuit due to a wiring problem, bad heater in the sensor, blown fuse, etc.

 

Just went to AutoZone and erased the code we shall see if that does it. It also had a camshaft position sensor code last weekend but I replaced the sensor so mabey erasing the codes will help if not then I will look into wether or not it is one of those problems. If the heater is bad it will trip those codes?

 

And if it is a wire problem I will must likely take it to Volvo to try and get it fixed I just can't see paying so much to Volvo of I don't have to

 

O2 heater will not set a cam position code. Rarely do cam sensors (in your year range) go bad. Usually it's a cam timing problem, a clogged solenoid screen, solenoid problem, and can even get set because the engine is low on oil or the oil is too thick. A code does not mean a part is bad - it simply means the signal from that part is not within normal parameters. Don't replace by code, it gets very expensive.

For an o2 heater code - the heater is tested when the car is first started cold -

 

as with codes, best to read them, write down on paper, clear and see if they return. Codes can get triggered due to transient or threshold events. If a part has failed, the codes will simply return. Most Autozone stores will "rent" a code reader for free or you can grab a $29 unit from Harbor Freight and keep it handy. Simple to do your own - look under the dash on the drivers side - you will see an 3x1/2 inch computer port socket (location varies by model). you simply connect the code reader to that, turn the key to position 2 (dash lights on, but don't start the car) and follow the prompts on the device. Usually you get the generic codes like "P0303" with some devices offering a description like "Misfire Cylinder 3". Once you get a code, time to google for your model ie "2010 Volvo XC90 P0303" and see what comes back for what the code means, possible causes and next steps / tests to run.