17 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHOxygen Sensor-Check Engine Light Problem
Leading reported evidence
Replace 2 oxygen sensors
Performed · outcome unconfirmed
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 performed work without a confirmed outcome
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.
Performed · outcome unconfirmed · Original poster
I replaced the 2 oxygen sensors for Bank 1 cleared the codes and everything was working fine.
Leading evidence: 'Replace 2 oxygen sensors' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'problem' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check fuel pressure' (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 suspect a cause
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.
Suspected cause · Original poster
Just thought I would throw in the Durametrics problem in case it maybe associated with the Check Engine Light and fuel mixture, but it is probably a problem for another thread.
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 · Original poster
The other day the check engine light came on so I decided to check the fuel pressure.
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.
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 · Original poster
I was thinking about replacing Bank 2 oxygen sensor, but haven't done that yet, but wonder why I'm still getting a reading that Bank 1 is still out of range.
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 · Original poster
I was thinking about replacing Bank 2 oxygen sensor, but haven't done that yet, but wonder why I'm still getting a reading that Bank 1 is still out of range.
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
Running the car that far in an overly rich condition would not be a good thing as it could get worse, and I would be concerned about eventual fuel contamination of the oil.
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
Actron makes a nice fuel pressure test gauge, but be sure to also buy the right angle adaptor which does not come with it and fortunately only costs a couple extra bucks.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
problem
No successful repair reported for this finding.
0
Identified cause
1
Suspected cause
0
Reported fixes
Read evidence and context
Discussions that suspect a cause
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.
Suspected cause · Original poster
Just thought I would throw in the Durametrics problem in case it maybe associated with the Check Engine Light and fuel mixture, but it is probably a problem for another thread.
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.
17 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Pelican Parts: 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 was thinking about replacing Bank 2 oxygen sensor, but haven't done that yet, but wonder why I'm still getting a reading that Bank 1 is still out of range.
I have a 98 Boxster that started showing the Check Engine Light. The Durametrics Program indicated that there was a misfire in Cylinder 1 and that the Oxygen Sensor was out of range in Bank 1 (Cylinder 1-3) and Bank 2 (Cylinder 4-6).
I replaced the 2 oxygen sensors for Bank 1 cleared the codes and everything was working fine. Engine sounded much better.
Problem: After driving about 800 miles the Check Engine Light comes on again. I hook up the Durametrics and get Bank 1 and Bank 2 oxygen sensor out of range.
Clear the codes and everything is runng fine for about 50 miles, then Check Engine Light comes on again.
Any ideas on my next step to analyze the problem and come up with a fix?
Engine sounds fine, but Durametrics indicates Bank 1 and Bank 2 oxygen sensor is out of range. I was thinking about replacing Bank 2 oxygen sensor, but haven't done that yet, but wonder why I'm still getting a reading that Bank 1 is still out of range.
Thanks for any suggestions
Just because an O2 sensor reads "out of range" does not mean it is bad, it is just reading out of range. The question then is why, and in which direction. If the sensor has "reached its enrichment limits", it mean it cannot make up for the O2 in the system with more fuel, or more plainly, you have a vacuum leak.
What are the codes you got?
The current fault codes from the durametric program are:
P1123 Oxygen Sensing Range 1 Cylinder (1-3)
P1125 Oxygen Sensing Range 1 Cylinder (4-6)
Thanks for guiding me JEP
Exactly what I thought, the codes indicate that both banks are running so rich that the DME cannot lean the engine out enough to get it into range. Most common fault: High fuel pressure (bad pressure regulator) or leaking injectors. As the codes are the same on both banks, I would start with a fuel pressure check.
Here is my current problem trying to analyze this: I'm 800 miles away from home where I have gauges and tools to start the troubleshooting.
Can I drive it home in the current condition?
What will I damage or what would I need to keep an eye on while driving?
Thanks for any input.
I would not rule out a vacuum leak......both banks running rich could me a leak between the maff and the plenum....the hard plastic ” flexible” vent pipes are notorious for getting brittle.
Id Pop off the service cover and see if you hear a his or see anything broken....
Running the car that far in an overly rich condition would not be a good thing as it could get worse, and I would be concerned about eventual fuel contamination of the oil.
How could an over rich condition beyond the capabilities of the DME to correct for stem from an intake vacuum leak, which should cause the exact opposite conditions?
I'm ready to get started testing the fuel pressure and I'm a handy newbie.
Any recommendations on the fuel pressure gauge tester to purchase?
Also, the sealing ring inside the brass cap needs to be replaced. Can I just get this at Advanced Auto or some local place, or do I need to get that from Porsche?
Actron makes a nice fuel pressure test gauge, but be sure to also buy the right angle adaptor which does not come with it and fortunately only costs a couple extra bucks. The Actron set up should cost less than $50.
Don't know if a regular parts store carries the correct size o-ring, we buy the entire cap by the bag full from a dealer.
Well I finally got around to testing the fuel pressure. For the last month I cleared the codes using Durametric Diagnostic Software and no check engine light appeared. The other day the check engine light came on so I decided to check the fuel pressure. The codes for the Durametirc software were P1125 Oxygen sensing range 1 Cylinder (4-6) and P1123 Oxygen sensing range 1 Cylinder (1-3).
I activated the fuel pump through the Durametric Software and the reading was 52 psi.
Also, here is another caveat which may or may not have something to do with the Check Engine Light. When using the Durametric Software it only allows me to access the Engine Option for ME5.2.2 for 1997-1999 which is fine. However, it won't allow me to access any other options like the ABS/DSC/PSM 5.3 for 1997-2001 or the Instrument Cluster K01 for 1997-2000 and it always tells me the cable is unplugged (even though it is not and the green light is on) for the Airbag, Air Conditioning, Alarm, etc.
I sent my cable back to Durametrics and they checked it and said it was something to do with my wiring.
Just thought I would throw in the Durametrics problem in case it maybe associated with the Check Engine Light and fuel mixture, but it is probably a problem for another thread.
I have had a reoccurring code P1123 on an infrequent basis. Car is a 98 with 57,000 Kilometers or 36,000 miles. I have seen P1125 once only.
I purchased an Actron fuel pressure tester and have 55 PSI (3.8 Bar) with engine off. With engine running the pressure tester needle buzzes between 48 and 52 PSI (3.3 to 3.6 Bar).
Is this indicative of an injector issue where I should remove the injectors and have them tested or does this show a pressure regulator fault?
Ron
This is a source reference. Confirm exact model applicability in the original material.
