Trouble codes P0113, P0137 and P0141?

JOHNJOHNSON1957

MEMBER
2001 OLDSMOBILE ALERO
3.4L
6 CYL
2WD
AUTOMATIC
150,000 MILES

The MIL is not on. Car gets lousy gas mileage (20-MPG at best) which implies the PCM may be operating on an open loop circuit. I put a code reader on it and got active codes of P0113 and P0137 and a pending code of P0141. So, what steps should I take to address these codes? Is there any one because that would account for these three trouble codes. Car starts easily and runs fine, it just gets lousy gas mileage.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
47,256 POSTS

Yep, with these codes it can affect the fuel milage, also this guide can help:

https://www.2carpros.com/articles/how-to-get-better-fuel-economy-88251617

P0113 - Intake Air Temperature (IAT) Sensor Circuit High Input:

P0137 - Oxygen Sensor Circuit Low Voltage (Bank 1, Sensor 2):

P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2):

Here is the location of the sensors so you can check out the connections and if okay I would replace the sensors. Check out the images (below). Please let us know what happens.

Images (Click to make bigger)