Question about Mercury Grand Marquis
I have a 2000 grand marquis I fix the ho2 sencor in back and front I'm still getting a reading of 1506 and 1152 came back up I'm not sure what's the problem I'm just stuck with this car can some please help me out?
Posted on Nov 07, 2015
P1132 --Lack of HO2S-11 Switch (Lean)
P1152 -Lack of HO2S-21 Switch (Rich)
You do not guess
You test or try things that do not involve money
Disconnect & Plug the vacuum hoses to EGR Valve
and test drive
Check for vacuum leaks,including the EVAP System.
You do not have leaking injectors or a bad pressure
If you have a vacuum leak it would lean out the
exhaust gases & the O2 Sensor would sense that
& tell the PCM to increase injector pulse width,thus you
go rich,then lean etc.
Stay calm & use logic. No big deal.
If the egr was stuck open it wouldn't idle very well.
Still could be bad.
Posted on May 23, 2011
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Posted on Jan 02, 2017
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