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Thread: 98 suburban Code po140
03-30-2014, 10:44 AM #1
- Join Date
- Sep 2011
98 suburban Code po140
Got the check engine light with code PO140 when scanned. I've heard several different items it could be and would rather get advice on a simple order to check or replace things.
Ive vey reset the code twice and it comes back. I just did again to see how long before light comes back.
Any advice would be greatly appreciated.
03-30-2014, 08:20 PM #2
Most likely a bad O2 sensor. This site has the best explanation and troubleshooting info. http://www.obd-codes.com/p01402012 Silverado 1500 LT 4X4
2003 Suburban LT 2500 6.0L
2004 2500HD Crew Cab LT 4x4 6.0L - SOLD
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