Question

2001 Saturn SL1 with engine code P0037, what could be the problem?

Answer 1

Hi there

This code is a problem with the heater circuit on the bank 1 sensor 2 o2 sensor. In most cases, the sensor is the problem and needs to be replaced. Here is some additional info on the code for you.

P0037 SATURN - HO2S12 Heater Control Circuit Low Voltage
Read more: https://www.autocodes.com/p0037_saturn.html