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AWD - P2188 System too rich at Idle Bank 1

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P2188 System too rich at Idle Bank 1

My 2004 XC70's engine has been fault-free for the 2 years since I bought it. It's the 5-cyl B5254 T2.

After filling fuel tank today, upon restart it threw a P2188

"System too rich at Idle Bank 1".

I noticed right away that the idle was choppy, almost stalling, then racing, then settling down. Driving home, the choppiness continued at stop lights. It's almost as if the throttle is getting whipsawed. My initial guess was contaminated fuel, but since the problem has continued all day, I'm doubtful.

What does the "too rich" error suggest? What should I do to pin down cause?






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New P2188 System too rich at Idle Bank 1
posted by  pbierre  on Fri Apr 26 17:29 CST 2019 >

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