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A/f Sensor, Heated Ox Sensor Codes


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Re 99RX

Check Engine Light came on. Had four Codes - P0125, P1130, P1133, P1135.

Shop Manual says:

P0125 Trouble Area is Bank 1 & 2 Sensor 1(A/F Sensors) or ECM.

P1130, P1133, P1135 all list Bank 1 Sensor 2 as Trouble areas BUT, the Detection Item is Bank 1 Sensor 1.

The Tech said he wasn't getting any output from Bank 1 Sensor 1.

So, which Sensor is bad?

Also, what is the difference between a "Detection Item" and a "Trouble Area"? For Codes 1130, 1133 and 1135, why does the manual list Bank 1 Sensor 1 as the "Detection Item" but then say Bank 1 Sensor 2 is the "Trouble Area"?

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Think I answered my own question.

I believe there are misprints in the "Trouble Area" columns on page DI-16, Volume I for Codes 1130, 1133, and 1135. When you look at the details for each code on pages DI-102 and 108, they say Sensor 1, NOT Sensor 2.

I also found another misprint on page DI-13 for Code 0125. It says heated ox sensor and heated ox sensor circuit are possible trouble areas yet on page DI-46, it says A/F Sensors Bank 1, 2 Sensor 1 are possible trouble areas. The Heated Ox Sensor is Bank 1 Sensor 2.

When you combine confusing terminology with shop manual typos, you have a real mess.

I'm betting the tech was right and I have a bad Bank 1 Sensor 1 is bad.

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