P2190 on 2008-2011 Buick Enclave — System Too Rich at Idle (Bank 2)
1 vehicles · 1 makes
Most Reported On
P2190 is an OBD-II diagnostic trouble code meaning “System Too Rich at Idle (Bank 2).” The PCM detected that bank 2 is running rich at idle, with fuel trims pulling fuel out to compensate. A rich condition at idle on the bank not containing cylinder 1. This code is most commonly reported on 2008-2011 Buick Enclave.
Common Causes
Diagnostic Tools
To diagnose P2190, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
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A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
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BlueDriver Pro Bluetooth Scanner
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Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
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LAUNCH CRP123X OBD-II Scanner
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A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
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Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
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FAQ
What does P2190 mean?
P2190 stands for "System Too Rich at Idle (Bank 2)." The PCM detected that bank 2 is running rich at idle, with fuel trims pulling fuel out to compensate. A rich condition at idle on the bank not containing cylinder 1.
What are the most common causes of P2190?
The most common causes of P2190 are: Leaking/dripping fuel injectors on bank 2, High fuel pressure / faulty regulator, Dirty/contaminated MAF sensor, Faulty bank 2 upstream O2 sensor, Leaking regulator into vacuum line. The specific cause varies by vehicle.
How much does it cost to fix P2190?
Repair costs vary widely depending on the root cause and vehicle.
Which vehicles are affected by P2190?
Au7o has documented P2190 across 1 vehicle models from 1 manufacturers: Buick.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.