Mechanics

EGR SYSTEM CAUSING CHECK ENGINE LIGHT GLOW

1997 Oldsmobile Cutlass • 6 cylinder FWD Automatic • 146,800 miles

My Check engine light is glowing on my 1997 Olds Cutlass Supreme with 3100 V-6 engine. I scanned it with the reader and it shows P0401, EGR restricted flow. Should I replace the EGR valve? A mechanic told me the EGR passages in the intake manifold need cleaning. Which fix is better? Thanks for any advice.

Stephen

Boston, MA.
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GM Driver
November 26, 2010.




Remove the EGR and clean both the EGR and the intake. Carbon builds up there and causes problems. While the EGR is off, clean it and check to make sure it is working.

Let me know what you find.

Joe

Well cleaning the passages with a wire broush and cleaningtheEGR is cheaper and may fix it. If not you may have to replace the egr and clean the passages anyhow. Use a small pic/screwdriver to clean the EGR. Make sure not to damage the pintle valve
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Hmac300
Nov 26, 2010.

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