O2 sensor bad?
#1
O2 sensor bad?
SES light on. Code read P0138 - which is O2 sensor before cat. There are two sensors before the cat and one after. EACH ONE costs $309.95 at Autozone. Guy there said some have been successful cleaning the sensor since build up on the sensor tip causes a faulty O2 reading. Is there a way to find out WHICH SENSOR IS FAULTY (firewall side or radiator side)? Guy at AZ said to remove it and clean it with a wire brush and some carb cleaner. If I don't know which one is faulty I don't want to ruin the still-good one buy putting solvent on it. Will solvent mess them up?
#2
How many miles do you have ? This should be covered by the 5yr 60K mile powertrain warranty. As far as cleaning goes, best way to clean it would be getting a propane torch and heatting up the cat to get rid of the carbon inside. It works, but mostly on old feedback carburated cars like late 80 early 90 Chevys.
#3
Originally Posted by Keviwe
SES light on. Code read P0138 - which is O2 sensor before cat. There are two sensors before the cat and one after. EACH ONE costs $309.95 at Autozone. Guy there said some have been successful cleaning the sensor since build up on the sensor tip causes a faulty O2 reading. Is there a way to find out WHICH SENSOR IS FAULTY (firewall side or radiator side)? Guy at AZ said to remove it and clean it with a wire brush and some carb cleaner. If I don't know which one is faulty I don't want to ruin the still-good one buy putting solvent on it. Will solvent mess them up?
#4
which O2 sensor bad?
I have 101,000 miles on my 03 Max (mostly highway miles) so no warranty coverage anymore. Please verify that code "P0138" is which sensor (before cat-firewall side or radiator side?) OR (After cat?).
Clean the cat with a propane torch? Should I avoid solvents?
Also, where did you buy O2 sensors for $120.00
Clean the cat with a propane torch? Should I avoid solvents?
Also, where did you buy O2 sensors for $120.00
#5
Originally Posted by Keviwe
I have 101,000 miles on my 03 Max (mostly highway miles) so no warranty coverage anymore. Please verify that code "P0138" is which sensor (before cat-firewall side or radiator side?) OR (After cat?).
Clean the cat with a propane torch? Should I avoid solvents?
Also, where did you buy O2 sensors for $120.00
Clean the cat with a propane torch? Should I avoid solvents?
Also, where did you buy O2 sensors for $120.00
#6
I just had the exact same problem on my 02 SE Auto. The dealer replaced both rear O2 sensors and reprogrammed the ECU. They charged me nothing because this is covered under the emissions warranty. There is a TSB to cover this. Its NTB02-051a.
#7
This should be covered by the 5yr 60K mile powertrain warranty.
Originally Posted by fendmax
I just had the exact same problem on my 02 SE Auto. The dealer replaced both rear O2 sensors and reprogrammed the ECU. They charged me nothing because this is covered under the emissions warranty. There is a TSB to cover this. Its NTB02-051a.
#8
It shows you in this TSB which sensor your code applies to.
http://maxima.theowensfamily.com/tsb/NTB02-051a.pdf
http://maxima.theowensfamily.com/tsb/NTB02-051a.pdf
#9
Originally Posted by Keviwe
I have 101,000 miles on my 03 Max (mostly highway miles) so no warranty coverage anymore. Please verify that code "P0138" is which sensor (before cat-firewall side or radiator side?) OR (After cat?).
Clean the cat with a propane torch? Should I avoid solvents?
Also, where did you buy O2 sensors for $120.00
Clean the cat with a propane torch? Should I avoid solvents?
Also, where did you buy O2 sensors for $120.00
Also, even the most expensive dealerships around here have O2 sensors for less than $150, so I'd say do some shopping around... $300 is nuts...
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