P2191
System Too Lean at Higher Load Bank 1
P2191 is an OBD-II diagnostic trouble code meaning: System Too Lean at Higher Load Bank 1. Common causes: vacuum leak in intake manifold, malfunction of the mass air flow sensor (maf). Estimated repair cost: $17–89.
Symptoms
- Loss of engine power
- Unstable idling
- Dips during acceleration
- Increased fuel consumption
- Check Engine Light Is On
Causes
- Vacuum leak in intake manifold
- Malfunction of the mass air flow sensor (MAF)
- Clogged fuel injectors
- Weak fuel pump
- Leaking intake system
How to Fix
- Check the intake tract for air leaks
- Diagnose mass air flow sensor and oxygen sensors
- Check fuel pressure and pump performance
- Clean or replace fuel injectors
- Check the EVAP system for leaks
Related codes
Error P2191 by Vehicle Brand
FAQ
What does the P2191 code mean?
P2191 is an OBD-II diagnostic trouble code that indicates: System Too Lean at Higher Load Bank 1
What causes a P2191 error code?
The most common causes of P2191 include: Vacuum leak in intake manifold; Malfunction of the mass air flow sensor (MAF); Clogged fuel injectors; Weak fuel pump.
How do I fix a P2191 diagnostic trouble code?
To fix P2191: Check the intake tract for air leaks. Diagnose mass air flow sensor and oxygen sensors. Check fuel pressure and pump performance. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2191?
Limited driving only, diagnose soon
How much does it cost to fix P2191?
The estimated repair cost for P2191 is $17–89. Actual cost depends on your vehicle, location, and labor rates.
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