2001 C70

It might be related to the extended warranty for the bad ETM. There is a "service campaign" for the electronic throttle system (ETS) and electronic throttle module (ETM) where they actually put in a new program that ignores errors by the ETM. If they need to replace the ETM, it covers that. It is not techically a recall, but "VSC 155 service campaign". They fix the ETM/ETS for 10 years or 200,000 miles, whichever comes first. They also reimburse people for repairs they have already paid for. For more information call Volvo Customer Care Center at 800-458-1552 or the ETM HELP DESK at 866-637-3774.

Here is what the campaign covers:

"Electronic Throttle Module (ETM) failure may illuminate Electronic Throttle System (ETS) light or MIL. Symptoms may include, uneven engine idle, and/or "limp home mode" that could restrict vehicle speed to 10-30 miles per hour. Faults of the ETM are stored as DTCs in the ECM. If OBD II detects a fault that might increase emissions, the MIL is illuminated. Remedy: A software upgrade will be performed at the next service interval, and ETM warranty extended to 10 years or 200,000 miles, whichever comes first."

It basically covers S70, V70, V70 XC, C70, S80, and S60 from 1999 to

For more information check page 2 of:

It just means that the rotary switch for the trip computer is starting to go bad. As in the switch is "disc"onnected from the trip computer. Just rotate the knob a few times from stop to stop.