DIYbanter - o2 sensors

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Jim GM4DHJ ...

January 31st 20 05:14 PM

o2 sensors

is it the upstream sensor one or the downstream sensor two that has the
biggest effect on MPG ? .....

Jim GM4DHJ ...

January 31st 20 05:15 PM

o2 sensors

On 31/01/2020 17:14, Jim GM4DHJ ... wrote:
is it the upstream sensor one or the downstream sensor two that has the
biggest effect on MPG ? .....
....if faulty

Mathew Newton[_2_]

January 31st 20 07:12 PM

o2 sensors

On Friday, 31 January 2020 17:16:03 UTC, Jim GM4DHJ ... wrote:
On 31/01/2020 17:14, Jim GM4DHJ ... wrote:
is it the upstream sensor one or the downstream sensor two that has the
biggest effect on MPG ? .....
...if faulty

Only the upstream is within the fuel control feedback loop. The downstream really just determines if the cat is working or not.

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