Chevrolet Corvette Stingray C7 Forum - View Single Post - Girlfriend's car check engine

Russell James · 12-09-2014, 03:14 PM

Maybe you got another bad O2 sensor.

You could try swapping them side to side.

I believe P0161 is the heating element current fault.

"The ECM detects that the HO2S 2 heater current is greater than 2.9 amps, or less than 0.3 amps for greater than 8 seconds."

Grabbed that from a GM manual.

So somehow the current flow is out of whack on that circuit. See if your scan tool can read that heater element circuit in amps. Wiggle the connections while watching the amps. Make sure the male pins and female side of the connectors look good, put in some dielectric grease into all the cavities.

Beyond that, will need a service manual wiring diag view to see what terminal out of the ECM is that heater element output. Then check for batt voltage at that output terminal.

If there is no batt output at the ECM pin, bad ECM. Good batt voltage there, problem in the wiring or sensor itself.

12-09-2014, 03:14 PM	#3
Russell James Drives: '15 SS 1LE, '69 Z28 drag car Join Date: Dec 2009 Location: Mich Posts: 4,482	Maybe you got another bad O2 sensor. You could try swapping them side to side. I believe P0161 is the heating element current fault. "The ECM detects that the HO2S 2 heater current is greater than 2.9 amps, or less than 0.3 amps for greater than 8 seconds." Grabbed that from a GM manual. So somehow the current flow is out of whack on that circuit. See if your scan tool can read that heater element circuit in amps. Wiggle the connections while watching the amps. Make sure the male pins and female side of the connectors look good, put in some dielectric grease into all the cavities. Beyond that, will need a service manual wiring diag view to see what terminal out of the ECM is that heater element output. Then check for batt voltage at that output terminal. If there is no batt output at the ECM pin, bad ECM. Good batt voltage there, problem in the wiring or sensor itself.