99 es o2 sensor problem
#1
99 es o2 sensor problem
I am very frustrated with my car! I just replaced the 2 front sensors (Bosch) bc it was giving me a specific code of p0171 system too lean. After it was fixed the codes cleared and running good, then the next day cel & trac came back on. Reading the same code & now when I mash the gas I hear a loud rattle coming from under the vehicle. Im in need of some advice please help.
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