Diagnostic trouble code (DTC) information
WARNING: This page is about a different car, the 2004 Volvo S40, 2003 Volvo S40, 2002 Volvo S40, 2001 Volvo S40, and 2000 Volvo S40. However, it is still accessible from the selected car via links, so may be relevant.
Condition
The control module receives information from the heated oxygen sensor (HO2S) about fuel / air mixture. If the fuel / air mixture deviates from λ=1, the short-term fuel trim will compensate for this by adjusting the injection interval so that λ=1 is achieved. When the short-term fuel trim makes an adjustment, the long term fuel trim will also be adjusted. A diagnostic trouble code (DTC) is stored when fuel trim has reached an upper limit (lean limit) or a lower limit (rich limit).
Substitute Value
Fuel trim disabled.
Possible Source
Rich limit:
- Contact resistance in the terminals
- High fuel pressure
- Leaking injectors
- Contaminated oil
- Defective heated oxygen sensor (HO2S).
Lean limit:
- Contact resistance in the terminals
- Low fuel pressure
- Air leakage in the intake system
- Leakage in the exhaust system
- Defective heated oxygen sensor (HO2S).
Fault symptom[s]
- Malfunction indicator lamp (MIL) lit.