Throwing Codes
Thread Starter
Race Director
Joined: Mar 2003
Posts: 11,624
Likes: 18
From: Dover MA
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19
Throwing Codes
An interesting update on a problem I posted some time ago (too far back to even think about searching for it 
).
I started getting the Service Vehicle Soon message while nothing was apparently wrong. Hitting reset made it disappear. It took to appearing each new startup just as the car reached operating temperature.
Pulling the codes revealed all H (history = past) codes, namely P1652 (pitch sensor) and R0363 and R0367 under HVAC (recirculation).
Now I don't have the full service report back yet, but here's the somewhat odd story the dealer tells me over the phone: that it is normal for the HVAC codes to appear in the system every time the HVAC system makes any change in settings (i.e. while on automatic or when I make a change). However, the only reason the SVS message appeared was that the module controlling the F55 suspension had failed, hence the 1672 pitch code, and that was what triggered the SVS. In other words, the HVAC had been "normally" accumulating error codes all the life of the vehicle until this other problem came along.
Now I'm no engineer but this is weird...
Well, we'll see how it goes when I get it back tomorrow, but I thought all you technically inclined types might be interested.
).I started getting the Service Vehicle Soon message while nothing was apparently wrong. Hitting reset made it disappear. It took to appearing each new startup just as the car reached operating temperature.
Pulling the codes revealed all H (history = past) codes, namely P1652 (pitch sensor) and R0363 and R0367 under HVAC (recirculation).
Now I don't have the full service report back yet, but here's the somewhat odd story the dealer tells me over the phone: that it is normal for the HVAC codes to appear in the system every time the HVAC system makes any change in settings (i.e. while on automatic or when I make a change). However, the only reason the SVS message appeared was that the module controlling the F55 suspension had failed, hence the 1672 pitch code, and that was what triggered the SVS. In other words, the HVAC had been "normally" accumulating error codes all the life of the vehicle until this other problem came along.
Now I'm no engineer but this is weird...
Well, we'll see how it goes when I get it back tomorrow, but I thought all you technically inclined types might be interested.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Make SURE you keep your old parts soooooo, you can ram it up their %$@ when it does not fix the problem! I think it sounds like a bunch oc crap to me! My HVAC systen does NOT throw or store any codes when I change modes. Make them demonstrate it on another C5!
Sounds like a S N O W job to me!
My 2 cents.
BC
Please let us know how you make out and maybe I or someone else can figure something out!
Sounds like a S N O W job to me!
My 2 cents.
BC
Please let us know how you make out and maybe I or someone else can figure something out!
Thread Starter
Race Director
Joined: Mar 2003
Posts: 11,624
Likes: 18
From: Dover MA
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16-'17-'18-'19
My sentiments, if perhaps a little strongly put.
We'll see how it goes with the replacement F55 module.
We'll see how it goes with the replacement F55 module.
