Volvo S40 II (2004 - 2012) warning lights: check engine light on
Is the check engine light or another amber warning light on in your Volvo S40 II (2004 - 2012)? This page lists supported warning lights (engine, ABS) and shows how to read and clear fault codes with the klavkarr OBD2 diagnostic scanner. Investigate the fault before a garage visit or a vehicle inspection.
Engine
Particulate Filter (DPF/PF)
Transmission
ABS
ESP Electronic Stability Program
Airbag
Engine
Particulate Filter (DPF/PF)
Transmission
Technical specifications for your Volvo S40 II (2004 - 2012)
Volvo engine versions tested by our customers. The scanner may still support fault code reading and clearing if your version is not listed; check its compatibility before purchase.
| Engine | Year | Fuel type | Power | Recommended scanner |
|---|---|---|---|---|
| 1.9Protocol: ISO 9141 | 2001 | Diesel | 115 | View scanners Volvo S40 II |
| 2.0Protocol: CAN 29bit 500kb |
2004 2005 2006 |
Diesel | 136 | |
| 2.0TProtocol: ISO 9141 | 1998 2001 |
Gasoline | 163 |
Frequently asked questions about S40 II warning lights
AdBlue, oil service, ABS and the check engine light, explained.
Why does the ABS warning light stay on?
It usually indicates an anti-lock braking system fault: a faulty wheel speed sensor, damaged ABS encoder ring, broken wiring or a problem with the hydraulic unit. Electronic diagnostics identify the code stored by the ABS control unit, helping you target further checks and repairs.
Why is the check engine light on?
It indicates a potential engine or emission-control problem, ranging from a minor fault to a more serious malfunction. A diagnostic scan with a klavkarr scanner for Volvo S40 II helps you investigate the cause before deciding what to do.
What exactly is an engine fault?
It can range from a minor issue to a serious malfunction that affects petrol or diesel engine performance or, in the worst case, causes permanent damage.
What should you do if a warning light comes on in your Volvo S40 II?
If an engine, airbag, ABS, ESP or other warning light comes on, act cautiously and follow your vehicle handbook. A compatible diagnostic scanner can read the stored fault information and help you investigate the cause.
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Based in Vannes since 2009, we make car diagnostics accessible to everyday drivers with our klavkarr scanners, made entirely in France, and EOBD Facile software.
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