What does fault code SUM-0138 mean?

Diagnostic fault code details for SUM-0138 (Volvo S60 (2001–2009), Volvo S80 (1999–2006), Volvo V70 (2000–2008)). Repair service at OBD Tuning.

VOLVO

SUM-0138 - Solenoid, suspension left rear. Temperature too high

System

Suspension Module (SUM)

Volvo models this fault code applies to

Applies to the following models:

4 models

S60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007)

Show models by year and engine (4)

What does this fault code mean?

The solenoid at the left rear wheel has become too hot. Poor contact in the connections and hard driving may be behind it, and the Four-C function is limited.

Possible causes

Poor contact in the connections
Hard driving

What you can do

1Clear the code and check whether it returns
2Check the connectors at the solenoid at the left rear and at the control module for contact resistance and oxidation
3Have a workshop measure the solenoid resistances
4After the repair, the Four-C system's adaptive data must be calibrated. Have a workshop do this

Symptoms you may notice1

No noticeable symptoms for the driver

What the fault can affect1

The Four-C function is limited

General guidance for car owners. Diagnosis on the car can point to a different cause.