2001 4runner P1138 - Toyota Nation Forum : Toyota Car and Truck Forums

mandyfig · 01-29-2011, 08:05 AM

I have an OBDII Scanner and picked up a P1138, my manual says, unknown.

Cleared it but came back.

Been researching but can not find 1138 but see reference to 1135.

Anybody has seen this?

Thanks.

jetwhine · 01-29-2011, 10:36 AM

Mandyfig,

That code appears to be a Nissan code.

mandyfig · 01-29-2011, 04:30 PM

Quote:

Originally Posted by jetwhine

Mandyfig,

That code appears to be a Nissan code.

Sorry, I meant P1135.

jetwhine · 01-30-2011, 04:38 AM

Mandyfig,

The A/F sensor is located just foreward of the catlytic converter on the exhuast pipe. That would be the one to replace. It must has a short or an open circuit in it. If that does not fix it then you might have a wiring issue or possibly a bad ECU. That would be worst case cenerio, the ECU being bad.