Help!
I am seeing various and intermittent warning messages and symptoms.
The car often starts out OK, and then I might get loss of power, and shaking, and then the ECS light will come on, followed in quick order by the ABS light, with an error message service required. And finally the tire pressure monitor light starts blinking. Once I get all these sensor errors it seems to run fine (with the sensor warnings stying on). The next time I start I may see no error messages, but within a few miles the symptoms and warnings start. again. Sometimes I just get the warnings and no other symptoms. One time while driving (no warning lights), I braked and the pedal went to the floor and it felt like metal on metal, but then the warning lights came on and everything was ok. This sort of thing has happened every day for several days now.

Today shortly after I started up and instead of the other warnings it said city safety service required.

Any ideas?

 

Codes?

Your first step should be a scan with a compatible scan tool that can talk to all the control units.

 

Unfortunately, I have to depend on the Volvo shop to do the scanning, and time is sort of the essence. They can't take me until Thursday, and I have to be 200 mi away on Friday, which cuts it sort of close, especially if parts might not be in stock, so I was hoping that someone would recognize the symptoms.

There has been a slight change how the car is acting.... Since the car decided the problem is with the "City Safety" system, it is not telling me about the ESC, ABS, or tire sensors. It is just giving me an informattion message that the "City Safety" system needs service, and I am not experiencing any physical symptoms. Is it possible that the computer is further diagnosing the problem, and sees it as a much less serious issue after getting more data? or is this all just a coincidence with a bunch of inconsistent sensor data?

If it is just a problem with the "city safety" system (or at least that the loss of power and braking issues have gone away and the "failures" are stable), I might be tempted to drive the 200 mi and get the car fixed when I get there. Would that be chancy?

 

Sorry

Your first step should be a scan with a compatible scan tool that can talk to all the control units.

Anything else will be a guess. And maybe an expensive guess. Your choice.

 

I took it in to the dealer, and they replaced 2 rear speed sensors. OK. seemed to solve the problem.

But now... a month later... I was driving down a narrow road at about 10-20 mph, when suddenly the brakes started grabbing and the city-safety alarm came on (not as before telling me it needed service, but a warning like the city safety had just deployed. The message reset when I turned the ignition off and on again.

So... 2 questions...
Would this be related to the previous issues I had reported before they replaced the speed sensors?
And would it be safe to drive the car until this gest looked at?