P2177
System Too Lean Off Idle Bank 1
P2177 is an OBD-II diagnostic trouble code meaning: System Too Lean Off Idle Bank 1. Common causes: vacuum leak, malfunction of the mass air flow sensor (maf). Estimated repair cost: $17–89.
Symptoms
- Unstable engine operation
- Power Loss
- Increased fuel consumption
- Check Engine Light Is On
- Dips during acceleration
Causes
- Vacuum leak
- Malfunction of the mass air flow sensor (MAF)
- Dirty or faulty fuel injectors
- Oxygen (O2) sensor malfunction
- Problems with the fuel pump or pressure regulator
How to Fix
- Check the system for vacuum leaks
- Check the operation of the mass air flow sensor and clean or replace if necessary
- Check the condition of the fuel injectors
- Check the operation of the oxygen sensor
- Check the fuel pressure in the system
Related codes
Error P2177 by Vehicle Brand
FAQ
What does the P2177 code mean?
P2177 is an OBD-II diagnostic trouble code that indicates: System Too Lean Off Idle Bank 1
What causes a P2177 error code?
The most common causes of P2177 include: Vacuum leak; Malfunction of the mass air flow sensor (MAF); Dirty or faulty fuel injectors; Oxygen (O2) sensor malfunction.
How do I fix a P2177 diagnostic trouble code?
To fix P2177: Check the system for vacuum leaks. Check the operation of the mass air flow sensor and clean or replace if necessary. Check the condition of the fuel injectors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2177?
Limited driving only, diagnose soon
How much does it cost to fix P2177?
The estimated repair cost for P2177 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat