Had check engine light come on while driving back. Pulled the code using OBDII scanner and found P0134 - Bank 1 sensor 1 No activity trouble code.
Tried to locate Bank 1 sensor 1, its on back side of engine against the firewall. You CANNOT see it directly so all work has to be done by the feel.
The Bank 2 sensor 1 is same part number and located in front. I first practised on that one as I can see it. Learnt how to unplug and unclip it from the anchor.
That learning helped me a lot as I now knew where the clips are and which direction & how much to push them to unclip.
I checked the brand of sensors installed to order same ones. Using phone camera I was able to take some pictures and saw NTK engraved.
I planned to replace both upstream sensor hence ordered two NTK 24385 online and sprayed some PP blaster on each while I wait for parts.
The sensors arrived after a day and I acquired some tools in the meantime. I rented O2 sensor socket set from Oreilly.
Since NTK sensors come with anti seize paste applied (its rated for that temp, I think its Nickel based as its gray), I didn't buy any.
When sensors arrived, I was able to use the slotted deep socket out of the set and remove both with no problem.
The one on backside is hard to reach and to make sure not to drop the socket in that area, I used 3inch extension and taped it so that its easy to handle.
Threaded the new sensors and did finger tight. After that torque each to 33lbf ft.
I read somewhere that it could be sensor heater problem and I should measure the resistance between yellow and blue wires to conclude if sensors are bad. I checked the resistance and both sensors (good and bad) showed 3.7ohms. Hence measuring heater resistance doesn't really tell us if P0134 is due to that. New sensors measures almost same resistance too (3.4ohms).
Then I disconnected the battery to clear the ECU for 5 mins. Started the van and left it running. I wanted the PP blaster stuff to smoke off and engine to heat up. Drove around for 20-30 miles and didnt see engine light coming back ON.
Tried to locate Bank 1 sensor 1, its on back side of engine against the firewall. You CANNOT see it directly so all work has to be done by the feel.
The Bank 2 sensor 1 is same part number and located in front. I first practised on that one as I can see it. Learnt how to unplug and unclip it from the anchor.
That learning helped me a lot as I now knew where the clips are and which direction & how much to push them to unclip.
I checked the brand of sensors installed to order same ones. Using phone camera I was able to take some pictures and saw NTK engraved.
I planned to replace both upstream sensor hence ordered two NTK 24385 online and sprayed some PP blaster on each while I wait for parts.
The sensors arrived after a day and I acquired some tools in the meantime. I rented O2 sensor socket set from Oreilly.
Since NTK sensors come with anti seize paste applied (its rated for that temp, I think its Nickel based as its gray), I didn't buy any.
When sensors arrived, I was able to use the slotted deep socket out of the set and remove both with no problem.
The one on backside is hard to reach and to make sure not to drop the socket in that area, I used 3inch extension and taped it so that its easy to handle.
Threaded the new sensors and did finger tight. After that torque each to 33lbf ft.
I read somewhere that it could be sensor heater problem and I should measure the resistance between yellow and blue wires to conclude if sensors are bad. I checked the resistance and both sensors (good and bad) showed 3.7ohms. Hence measuring heater resistance doesn't really tell us if P0134 is due to that. New sensors measures almost same resistance too (3.4ohms).
Then I disconnected the battery to clear the ECU for 5 mins. Started the van and left it running. I wanted the PP blaster stuff to smoke off and engine to heat up. Drove around for 20-30 miles and didnt see engine light coming back ON.
