24 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOxygen sensor failure after water pump change?
Leading reported evidence
Check of the connections
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Give a check of the connections and that the sensor wiring is routed correctly.
Leading evidence: 'Check of the connections' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check of the connections' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Look for any signs of the sensor being knocked about, finger prints or a real clean sensor (wiped off), wrench marks that suggest the thing was handled maybe removed to be "cleaned" or when installed possibly the wrong thread lube used.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Look for any signs of the sensor being knocked about, finger prints or a real clean sensor (wiped off), wrench marks that suggest the thing was handled maybe removed to be "cleaned" or when installed possibly the wrong thread lube used.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
When removing the cats to replace the water pump (or at any time), it's not that difficult to impact the O2 sensor and damage it because it sticks out prominently...
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Look for any signs of the sensor being knocked about, finger prints or a real clean sensor (wiped off), wrench marks that suggest the thing was handled maybe removed to be "cleaned" or when installed possibly the wrong thread lube used.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Look for any signs of the sensor being knocked about, finger prints or a real clean sensor (wiped off), wrench marks that suggest the thing was handled maybe removed to be "cleaned" or when installed possibly the wrong thread lube used.
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
When removing the cats to replace the water pump (or at any time), it's not that difficult to impact the O2 sensor and damage it because it sticks out prominently...
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
24 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
1 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
I had the same problem years ago and the new MAF fixed it.
Just wondering if anyone else has expereinced this. Had my waterpump changed at local, very well respected Indy. Had a LNE low temp thermostat installed at the same time. When I picked up the car the CEL came on. He reset it and said all should be good. Drove fine but when I started it the next day, the CEL came on again. Took it back and he found that the passenger side O2 sensors (Bank 2) were no longer functioning and would need to be replaced.
He said that on occasion these fail when they are unplugged and then plugged back in. He had unplugged them to drop the exhaust on that side.
Any one else experience this? Have ordered new ones from Suncoast.
Ted
Have you checked to make sure they got plugged back in? Seems odd it would be both sensors on the same bank suddenly. Did he mention what the failure codes were. Short to ground, internal resistance, etc?
I would make sure conections are clean and wires didnt get damaged by pulling/hot exhaust etc. they can be checked for resistance ohms etc.I doubt they would go bad by just disconecting.I have found in the past when one goes bad the others arent far behind.
They screw into the exhaust pipe, like a spark plug and have a wire bundle coming out of it. Very easy to spot. Follow the wire and see if the connectors are hooked up. The shop could have forgotten unplugging them end the wires got damaged. There are several possibilities but someone needs to look at it first. Oxygen sensors DON'T fail because they were disconnected. Find another mechanic. This one knows how little you know and is taking advantage of it. Real shame. It's like telling you that you that your alternator is low and needs to be filled up. Total BS.
Had the CEL come on today for the first time ever since i've owned the car. Went to the dealer mechanic.... apparently O2 sensor(s) suspect. 0_o
goodbye cruel world.....
Not hard at all. Just unplug the connectors, un-screw the O2 sensor from the exhaust (near the cat) and then work backwards with the new sensor.
This stuff is easy and there really is no reason to pay someone else's husband to un-clip and un-screw something you can do with standard everyday tools.
When removing the cats to replace the water pump (or at any time), it's not that difficult to impact the O2 sensor and damage it because it sticks out prominently...
They are only easy if the threads are not covered in carbon. When that happens, it will pull the threads out and make a simple job, a headache.
All O2s fit a 22mm, but there are specific O2 sockets that should be used if the you don't wan to cut the old wire off. These sockets are around $10 and there are two different styles. If you are not planning on re using the old sensor, just cut the connector off and put the box end of the 22mm wrench on it. Once it's cracked loose, it should almost come out by hand. If there is a lot of resistance, go back and forth and use WD40 (or something similar).
ok great advice guys. as it happens, drove out of the garage this morning....and the light was no longer lit! -_- . Does that imply something was loose? tank of bad gas? ( i only use 94 oct). Or is this maybe a lucky reprieve? Oy.
My WAG is it is a temporary reprieve.
That it occurs suggests a marginal connection that is a sensor connector not fully inserted/secure in the mating wiring harness connector.
Have you been under the car with a bright light looking at the sensor or senors pinpointed by the error code(s)?
Look for any signs of the sensor being knocked about, finger prints or a real clean sensor (wiped off), wrench marks that suggest the thing was handled maybe removed to be "cleaned" or when installed possibly the wrong thread lube used.
Give a check of the connections and that the sensor wiring is routed correctly.
Unless the car was in the shop for months or you had to blow cobwebs away from the gas pump to fill up the last time I'm thinking bad gas is not likely.
Sincerely,
Macster.
So, weeks later, we get to the bottom of the CEL that popped up suddenly. The diagnosis is a faulty MAF sensor. I am told that this item has to be sourced from the factory in Germany (!!) Not sure why they can't just go to Pelican. They're giving me a $1500 estimate for fix. I will report.
TC
LOL...you can buy a MAF for ~$280 and install it in less than 5-minutes if you are a slow poke.
Contact Kevin
https://rennlist.com/forums/members/1437-kevin.html
