Check engine light

[u_say_go]

2002 ford explorer. CEL came on yesterday. took it to auto zone to get the code read, came back with P0152. oxygen sensor? are there 2 O2 sensors or just one?
Truck's not here for me to check out, so I thought I'd see if anyone here could give me some insight.
thanks

[Dr.Buick]

P0152 is Bank 2 sensor 1 not switching, It is the upstrem pass side sensor on a ford Pre cat.

[BAD LS1]

Higher than normal voltage return is seen from that sensor. There at 4 o2's on that FYI. Your problem child is the pre cat sensor on bank 2 (pass side)


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[u_say_go]

you guys rule! thanks for the quick replies