2005 GMC Sierra with long tube headers. Rear O2 Sensors were disabled with a Nelson's tune, now 2 years later I'm getting this code P1154.
2005 GMC Sierra with long tube headers. Rear O2 Sensors were disabled with a Nelson's tune, now 2 years later I'm getting this code P1154.
<div class='quotetop'>QUOTE(EddieBOOM! @ Apr 8 2007, 02:20 PM) [snapback]89070[/snapback]</div>Dont see this one much, The PCM runs a one time test of the 02's every ignition cycle. In the test period it monitors the time it takes to switch from Rich to Lean and Lean to Rich to find the average... Then takes the average and divideds the Rich/Lean, Lean/Rich to find the Ratio. IF one fall out of line you get this code.2005 GMC Sierra with long tube headers. Rear O2 Sensors were disabled with a Nelson's tune, now 2 years later I'm getting this code P1154.
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Check the basics, Exhaust leak, 02 signal-wiring etc... BUT normaly its just the 02 itself or the 02 sensor is contaminated by Bad gas, Oil or coolant consumtion.
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