VOLVO
CCM-DD34 - Air quality sensor (AQS). No communication
System
Climate Control Module (CCM)
Volvo models this fault code applies to
Applies to the following models:
10 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), S60 (2001–2009), S80 (1999–2006), V50 (2004–2013), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (10)
- Volvo C30 (2007–2013)2007–2013
- Volvo C30 Electric (2011–2013)2011–2013
- Volvo C70 (2006–2013)2006–2013
- Volvo S40 (2004–2013)2004–2012
- Volvo S60 (2001–2009)2005–2009
- Volvo S80 (1999–2006)2005–2006
- Volvo V50 (2004–2013)2004–2012
- Volvo V70 (2000–2008)2005–2008
- Volvo V70 XC / XC70 (2001–2007)2005–2007
- Volvo XC90 (2003–)2005–2015
What does this fault code mean?
The climate control module (CCM) loses contact with the air quality sensor (AQS) on LIN bus 2, so the sensor cannot send its readings. Air quality in the cabin cannot then be monitored. The fault only applies to cars with electronic climate control (ECC).
Possible causes
- Break in LIN bus 2 wiring between the module and the air quality sensor
- Poor contact, corrosion or loose connections at the connectors
What you can do
- 1Check that the air quality sensor connector is secure and clean
- 2Clear the codes, road test the car and see whether they return
- 3Check with a multimeter that the wire between the module and the sensor is not open when the connectors are disconnected
- 4Check with a multimeter that the sensor has voltage and ground at the connector when the ignition is on
- 5Replace the air quality sensor if you can reach it and the fault remains, otherwise have a workshop do it
Symptoms you may notice1
- Poor air quality in the cabin
General guidance for car owners. Diagnosis on the car can point to a different cause.