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66chevelle903
User
Mar 11, 2010, 2:40 PM
Post #1 of 2
(3624 views)
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01 silverado,po140,160
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i replaced both rear o2 sensors,but the ses light came back on,it started with the 140 now 160,which is no activity,the only other code was 128 but i fixed it,thermostat,im stumped,
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DanD
Veteran
/ Moderator
Mar 12, 2010, 11:43 AM
Post #2 of 2
(3608 views)
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Re: 01 silverado,po140,160
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From the quick read of the test procedure; it’s telling us to look for an open in the circuit(s) between the sensor and the computer. If no opens are found and you’ve confirmed that the O2 can and will produce a varying voltage; replace the computer.
Dan.
Canadian "EH"
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