2001 Nissan Quest

SES Light On

Getting a Knock Sensor Error and Fuel Temperature Error.

2 Part Question:

How difficult is it to replace the knock sensor?
Which Sensor need to be replaced for Fuel Temperature. Local Garage and Auto Parts Store believe it's the Ambient Temperature guage???

Any help would be appreciated.

KNock sensor very difficult fuel temperature easy just disconnect the battery and see if the code comes back again.