Q: Replaced pre-cat with header. Will a 02 simulator make engine light go off!

asked by on

Because I heard that the pre-cat breaks up and causes engine problems, I replaced it with a header. Now the engine light wont go off. I have had it checked and it is caused by the header. Is there away to use a 02 simulator to make the light go off. Also, several people have said that the 2006 Altima has 2 02 sensors, I only find 1. Where would the down stream be located? Thanks for your help! Brad

My car has 155000 miles.
My car has an automatic transmission.

Hi Brad. Thanks for submitting your question tonight. Unfortunately, when aftermarket alternations are made to a vehicle, our ability to offer accurate repair tips and advice is compromised, as we don’t offer tips on aftermarket alterations. You should probably consult with an online Nissan performance forum, so you can get some accurate tips from people who have gone through this same issue. By the way, the downstream sensor is always located after the catalytic converter.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Replaced pre-cat with header. Will a 02 simulator make engine light go off!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: My car won't shift gears and revs really high.

Hi There, Although it may be tough to say for certain without inspecting the transmission in your car, this may be potentially less than replacing the entire transmission. This may be a faulty transmission control solenoid. As you know, automatic...

Q: Q: Reverse not working

If you are able to put the transmission in reverse, but it just wont go and acts like its in park/neutral, you could be having internal transmission issues. There are many components inside an automatic transmission but things like a...

Q: My car is overheating and leaking from somewhere - 2005 Nissan Altima

Hello. You may have a leaking water pump or cooling fans that are not working. I recommend having the cooling system performance tested and pressure tested by a qualified mechanic. Since it is overheating already, you may have blown a...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...