6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHsymptoms of bad O2 sensor ?(long)
Leading reported evidence
Tighten cable (and tie-wrapped it)
Performed · outcome unconfirmed
No successful repair reported for this finding.
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Reported fixes
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Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed
They tightened the cable (and tie-wrapped it) then cleared the faults and all my problems went away.
Leading evidence: 'Tighten cable (and tie-wrapped it)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check <a href="http://www.boschusa.com/autoparts/oxygensensors/" target="_blank">bosch site </a>' (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.
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Check <a href="http://www.boschusa.com/autoparts/oxygensensors/" target="_blank">bosch site </a>
Suggestion or failed attempt
No successful repair reported for this finding.
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Unsuccessful attempts
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Suggestion
Check the <a href="http://www.boschusa.com/AutoParts/OxygenSensors/" target="_blank">Bosch site </a> for more info and part numbers.
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.
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Suggestion
Bosch now recommends replacing each o2 sensor every 30000 miles.
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.
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Suggestion · Original poster
I wanted to change the fuel filter (cheapest and needed to be done anyway) hoping that would clear the O2 sensor error too.
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.
6 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
The fuel filter did not fix the hesitation problem either.
My check engine light came on last week and after resetting it several times, finally went to the dealer. Symptoms include rough idle when cold. So rough in fact that if you give it too much throttle it will stall out. Additionally, if the pedal is "floored", the car balks very badly and acts like it is going to stall.
The dealer said there were 3 fault codes. The first was a fuel pressure error which he interpreted to mean a dirty fuel filter. My car has 73K miles on the original filter, so I changed it. The other two codes were, O2 sensor and crankcase pressure. I am not sure what the latter code was but the dealer seemed to think it was because my oil cap was cross threaded and not sealing properly. They also found two vacuum lines off placed them in the appropriate locations.
Anyway, after the fuel filter replacement, the light came back on after about 100 miles. The fuel filter did not fix the hesitation problem either.
What I am wondering, is could this be caused by a bad O2 sensor(s)? I wanted to change the fuel filter (cheapest and needed to be done anyway) hoping that would clear the O2 sensor error too. Do the above symptoms sound like an O2 sensor problem? I have never had that problem before so I have no experience to draw on. Any other things I should look at for the hesitation problem? It has a stock filter BTW.
Thanks
That's exactly the symptom of a failed O2 sensor (or 2, or 4, or however many you may have) - see my posts over on the 993 board for another example <img border="0" title="" alt="[Wink]" src="wink.gif" />
Bosch now recommends replacing each o2 sensor every 30000 miles. You can get the same part(s) for 1/3 dealer cost at <a href="http://www.boschautoparts.com." target="_blank">www.boschautoparts.com.</a> (no affilation, just a statisfied customer)
Hope that helps!
sean
Oxygen sensors are replaced in matched pairs (US cars). The is one befrore the cats and one after. Check the <a href="http://www.boschusa.com/AutoParts/OxygenSensors/" target="_blank">Bosch site </a> for more info and part numbers.
BTW... my car once had several faults reported (including oxygen sensor) and after 3 days the dealer found the cable connecting to the DME loose! They tightened the cable (and tie-wrapped it) then cleared the faults and all my problems went away. They said they had never seen that before.
this is a forum for Porsche, but it sounds like you may have a different problem. Maybe a stuck injector?!?
the o2 sensor is very accessible in a stanza incase your interested.
Holy crap! CONGRATULATIONS! You win the Rennlist 996 Forum prize for resurrecting a 2003 thread in 2021 AND with the wrong model/type of vehicle. Way to go....
This is a source reference. Confirm exact model applicability in the original material.
