VOLVO
UEM-0033 - Rear right reading lamp. Signal missing
System
Upper Electronic Module (UEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
What does this fault code mean?
The code concerns the signal to the rear right reading lamp. It is set when the control module sees a bad control signal from the lamp circuit while the rear right lamp and the front right lamp are in opposite states, one lit and the other off. The fault comes from a break in the signal wire or from that wire being short-circuited to voltage.
Possible causes
- Break in the signal wire for the rear right reading lamp
- The signal wire for the rear right reading lamp is shorted to voltage
What you can do
- 1Check that the bulb in the rear right lamp is intact.
- 2Look for loose connectors and oxidation at the upper electronic module and at the rear lamp unit.
- 3Read off the code, clear it and check whether it returns.
- 4With a multimeter you can check that the wire running from the upper electronic module to the rear lamp unit is not broken.
- 5If the fault remains, have a workshop check the wire and correct it if needed.
Symptoms you may notice1
- Passenger compartment lighting does not work
What the fault can affect1
- The rear right lamp goes out
General guidance for car owners. Diagnosis on the car can point to a different cause.