System Too Lean Off Idle Bank 1
Table of contents
P2177 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 do I fix code P2177 VOLVO?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Tech Notes
- The engine is “too Lean” when the O2 sensors detect more air than fuel during combustion. There are two likely issues for a lean system problem. One of the problems could be unmetered air is entering the engine, in other words, there is an air intake leak after the Mass Air Flow (MAF) sensor. The other problem could be clogged fuel injectors. Fuel additives sometimes will fix clogged fuel injectors.
Cost of diagnosing the P2177 VOLVO code
The cost of diagnosing the P2177 VOLVO code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P2177 VOLVO Description
The control module receives information from the heated oxygen sensor (HO2S) about the fuel/air mixture when idling at both the lower and upper part-load range. If the fuel/air mixture deviates from λ=1, the short-term fuel trim will compensate for this by adjusting the injection time so that λ=1 is achieved. When the short-term fuel trim makes an adjustment, the integrator median must be adjusted by the long-term trim. Diagnostic Trouble Code (DTC) ECM-260A is stored when the long-term trim must be adjusted to almost maximum in the upper part load area