VOLVO
ECM-P117800 - Fuel/Air Mixture Too Lean during Quick Test of Fuel Trim. General Failure Information. No sub type information
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsS60 (2011–), S80 (2007–), V70 (2008–)
Show models by year and engine (9)
- Volvo S60 (2011–)2011–2012Engine B5254T5 only
- Volvo S80 (2007–)2007–2008Engine B5254T6 only
- Volvo S80 (2007–)2009Engine B5254T6, B5254T8 only
- Volvo S80 (2007–)2010–2011Engine B5254T10, B5254T11, B5254T8 only
- Volvo S80 (2007–)2012Engine B5254T10 only
- Volvo V70 (2008–)2008Engine B5254T6 only
- Volvo V70 (2008–)2009Engine B5254T6, B5254T8 only
- Volvo V70 (2008–)2010–2011Engine B5254T10, B5254T11 only
- Volvo V70 (2008–)2012Engine B5254T10 only
What does this fault code mean?
This code is only set during the workshop quick test of lambda control, which is used to find air leaks or low fuel pressure, for example. The fuel-air mixture is then too lean compared with the expected value, with the fuel adaptations reset. This indicates a fault that could cause lambda control codes during normal driving.
Possible causes
- Air leak in the intake system
- High fuel pressure or leaking injectors
- Damaged mass airflow meter or oxygen sensor (HO2S)
- Contaminated engine oil or oil level too high
- Fuel in the engine oil, which reduces its quality, especially after repeated cold starts without warm-up
- Incorrectly calculated ethanol content
What you can do
- 1Look for air leaks in the intake system, for example at hoses and clamps
- 2Check the oil level on the dipstick and make sure it is not too high
- 3If the car has had many cold starts without warming up, fuel may have mixed into the engine oil, which is worth telling the workshop
- 4Have a workshop check the injectors, the oxygen sensor and the mass airflow meter
Symptoms you may notice1
- No noticeable symptoms for the driver
General guidance for car owners. Diagnosis on the car can point to a different cause.