P1174 VOLVO Possible Causes
- Intake air leak
- Clogged or leaking fuel injectors
- Faulty oxygen sensor
- Faulty mass air flow (MAF) sensor
- Exhaust system air leaks
- Fuel injection problem
- Engine mechanical condition
How to Fix VOLVO Code P1174?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Check engine light on (or service engine soon warning light)
P1174 VOLVO Meaning
The control module receives information from the heated oxygen sensor (HO2S) about the fuel/air mixture at idle in both the lower and upper partial load ranges. If the fuel/air mixture deviates from λ = 1, the short-term fuel compensation will correct this by adjusting the injection time so that λ = 1 is achieved. When short-term fuel compensation makes an adjustment, the integrator median must be adjusted by the long-term compensation. Diagnostic trouble code (DTC) ECM-260A is stored when the long-term trim needs to be set almost to the maximum in the upper partial load area.