15 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHCode 1531?
Leading reported evidence
Replace actuator
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
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
He may have replaced the actuator for you which is more involved and you must enter the engine to do so.
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Now that I've done it once and know what to look for, I think I could probably check the cam timing in 2-3 hours and $22 worth of cam end plugs from Pelican (the car has 6 but you really only need to remove 4 to check the timing).
Leading evidence: 'Replace actuator' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, the most frequently mentioned possible cause is 'intermittent stick or electrical problem' (1 discussions; 0 report identifying it and 1 suggest it). The most frequently discussed action is 'Check timing)' (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 performed work without a confirmed outcome
1
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
I changed the cam sensor, but the code came right back.
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
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Performed · outcome unconfirmed · Original poster
I then had the car at an indy shop that replaced plugs and code 1531 popped up on their generic tool.
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
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Suspected cause
as far as my car goes the CEL didn't come on again so it's probably an intermittent stick or electrical problem...
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
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0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
Now that I've done it once and know what to look for, I think I could probably check the cam timing in 2-3 hours and $22 worth of cam end plugs from Pelican (the car has 6 but you really only need to remove 4 to check the timing).
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check timing)
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
Now that I've done it once and know what to look for, I think I could probably check the cam timing in 2-3 hours and $22 worth of cam end plugs from Pelican (the car has 6 but you really only need to remove 4 to check the timing).
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.
15 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.
2 acknowledgements have no verified action link; they do not establish a repair result.
Outcome without a verified action link
then the CEL came back two weeks later and same code...
My car went into the shop and indicated a failed cam sensor. The code was cleared and I went on my way. I then had the car at an indy shop that replaced plugs and code 1531 popped up on their generic tool. They think it's the actuator for the cam variable system. My car is a '99. Could this be the same code or problem and the generic tool is just not reporting correctly? Thanks for your thoughts............
P1531 Camshaft Adjustment, Bank 1
Actuator triggered, no active position.
Potential causes:
- Open circuit in triggering wire.
- Open circuit in B+ supply.
- Actuator faulty.
on a 99 thats a pretty invasive procedure, make sure they know what they are doing before you authorize the work. real easy to screw up.....................
I picked up a 1999 996 with 100,000 miles on it for a track car, and it had the same code. I changed the cam sensor, but the code came right back. I had a bunch of other intermittent codes caused by vacuum leaks and a bad coil pack, so I was getting multiple codes. When the other issues were all corrected, the cam adjustment code kept recurring. In the end, I found that cam timing was way off on one bank. Retiming the cams corrected the problem.
Timing cams on is a pretty involved proceedure requiring some rather expensive tools to hold the crank and cams in perfect relation to one another while the cam gear is adjusted. If you also have to remove the actuators, the cams will have to come right out which involves more jigs to hold the cams in place when the cam covers are removed (half of each cam journal is an integral part of the cam cover casting so you need the proper tools to avoid damaging the cam cover).
You can check the cam timing without removing the cam covers (or exhaust system, chain tensioners, oil pumps, etc.) which would save a ton of work if one or both banks are not actually out of time. The proceedure is to lock the crank at TDC, remove the inspection plugs on the end of all 4 cams and insert the timing tool. The Porsche tool is expensive but you can buy a knock-off tool made by Sir Tools (p/n P253) for under $200 that works just fine, and which Pelican sells as well. One bank should be in perfect time, the other 180 degrees out (in perfect time if you rotate the engine 180 degrees and lock the crank again). Now that I've done it once and know what to look for, I think I could probably check the cam timing in 2-3 hours and $22 worth of cam end plugs from Pelican (the car has 6 but you really only need to remove 4 to check the timing). Find a good shop that knows what they are looking for and they can potentially save you a ton of dough.
Thanks for the input. Hopefully I'll know more on Monday. I just think it's odd that it showed the sensor and now it may be showing something different.
my car had this code as well... but after driving for a day it went off... then the CEL came back two weeks later and same code... again I drove for 1-2 days and the CEL went off again... is it possible something is "sticking" intermittently and correcting itself and when it sticks it causes a CEL in these situations?
funny you mention that... the 2nd time the CEL lit up the car had sat for about a week so that may be it... in any case I"m running 0W40 mobil 1 and the CEL hasn't come on again...
my friend had this as well except he was getting a flat spot in power between 5500-6500 rpm and it was very noticeable...no power loss in my case... not yet anyways...
I'm getting the flat spot at the range your freinds car was, what did he do and how was it resolved. I'm on the thicker oil now but was going to switch back to the 0w and change the sensor............... Hmmmm...
The cam sensor is easy to change and is external to the engine. It is not likely the cause of your problem as it only reporting a problem. You wouldn't throw out your home smoke detector just because it propely reported that there was a fire, would you?
all I know is he changed the cam sensor and that is not a small job... probably 7 hours labour??
as far as my car goes the CEL didn't come on again so it's probably an intermittent stick or electrical problem... the last two times it came on it went off within a day of driving and no power loss....
now if your feeling the power loss it's definitely time to replace the sensor.. I wish I could tell you more about this problem and what it means but your best bet is to find a shop that has done this and is intimately familiar with the symptoms and causes ...
Replacing the sensor is only about an hour job, with smoke and coffee break. He may have replaced the actuator for you which is more involved and you must enter the engine to do so.
thx for correcting me there... actuator vs. sensor...
GOT IT! big difference... in dallasboats case it sounds like the actuator needs replacement since he is experiencing power loss... I was speaking to my mechanic today and he has seen this problem on MY 2002 996s... it's not just common to 99's...
