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Tim Mohr
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1998 toyota camry with 2.2 motor have a code of PO1133, already

Customer Question

1998 toyota camry with 2.2 motor have a code of PO1133, already changed air and fuel metering sensor, still not fixed. Any suggestions?
Submitted: 7 years ago.
Category: Car
Expert:  Tim Mohr replied 7 years ago.
PO1133 is a code for the Heating circuit of the AIR/FUEL sensor, If you have already replaced it, you have a wiring or ecm problem. Here is a wiring diagram to help trace it.graphic
Customer: replied 7 years ago.
do you have any better location in wiring or maybe a color?
Expert:  Tim Mohr replied 7 years ago.
the a/f sensor is in the exhaust manifold, in front of the radiator. The colors are on the diagram. L/Y is lavender and yellow, The BR is brown. the W is whitethe B is black. Hope this helps. Tim
Customer: replied 7 years ago.
Have you had any one color go bad or is it the entire wiring harness?
Expert:  Tim Mohr replied 7 years ago.
you want to make sure you have 12 volts on the Black and yellow wire and a good ground on the brown wire, thaty is the heating circuit.
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Customer: replied 7 years ago.
would it be corrsion or maybe a one bad wire? if so would i have to replace the whole wiring assembly? or do you think it is more likely the ecm? what would you do here?
Customer: replied 7 years ago.
thanks for the help.
Expert:  Tim Mohr replied 7 years ago.
Its more likely a broken wire, you will need to trace out those two wires,Tim

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