Oxygen sensor simulator as a diagnostic aid?

Question:
A scan to my car brought a p0137 (secondary o2 sensor, low volt) I replaced the sensor with a new one and resetted the ecu. The c.e.l. came back a day later. I installed an o2 sensor simulator to fool the ecu into thinking the sensor is fine.

Crossed spark plug wires?

The c.e.l. comes back after a week of driving with a p0420 (cat below threshold efficiency).

Any1 know whats wrong with my car?

Is it correct to conclude that I have a wiring problem between the ecu and the sensor? Any help will be appreciated.

How do i wire my glow gauges i just got?

Thank you

Answers:

Should my friend help pay for car door that she broke?

NO sometimes a fault code is only symptomatic and not a true indicator of the root cause. You need a professional scanner to 'see' what your engine and air pollution controls are doing to really identify the problem.

---

I took apart my car and can't put it back. Help!?

new ones can be off there mark i would try another o2 sensor since there so cheap/lol

---

More Questions & Answers ...

Nitrogen air for the tyres?

How to do a head gasket... help!!?

Are there any advantages of a SOHC engine?

Does anybody know how to reset the fuel saftey swithch on a 2003 olds alero?

How much should I expect to pay to have a new engine installed in my 1997 Mercury Sable?

I have a Mercedes C250D sport 1994 , every morining it wont start and only starts when battery is nearly flat?

EGR Valve or what?

Whats better for a truck that is half and hlaf when it come to off road and on road?

Where do i check if my fan is blocked on my honda accord?

94 Thunderbird Starting problem's?

This article contents is post by this website user, CarQnA.com doesn't promise its accuracy.