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2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

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6 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCH2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Leading reported evidence

Clean immobilizer

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 have a 99 Cab so I also removed, inspected and cleaned the immobilizer which showed not signs of water or even any corrosion damage.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options
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Leading evidence: 'Clean immobilizer' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Clean immobilizer' (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.

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1 matching discussions · 6 captured posts examined · 0 partial discussions

Compare 4 other evidence results

Clean off both sides

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 still cleaned off both sides with contact cleaner.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Test clutch switch by jumper

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 also tested the clutch switch by jumper and with the Durametric and its activates perfectly.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Use durametric and initialize the fuel pump, fans, etc

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 used the Durametric and initialize the fuel pump, fans, etc.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Repair companies, what are my options in troubleshooting or

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 · Original poster

Before I reach out to one the ECU Repair companies, what are my options in troubleshooting or repairing this code without having to send the ECU/Immobilizer and Key out or diagnosis and repair?

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options
Frequently discussed actions (9)

These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.

Clean immobilizer

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 have a 99 Cab so I also removed, inspected and cleaned the immobilizer which showed not signs of water or even any corrosion damage.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Clean off both sides

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 still cleaned off both sides with contact cleaner.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Repair companies, what are my options in troubleshooting or

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 · Original poster

Before I reach out to one the ECU Repair companies, what are my options in troubleshooting or repairing this code without having to send the ECU/Immobilizer and Key out or diagnosis and repair?

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Repair only option

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 · Original poster

So are there any other options or is sending the ECU, etc...out for repair my only option?

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Replace immo

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

If you had a PIWIS and more importantly the IPAS/programming codes, you could do a few more things like reprogram the key to the Immo or even replace the Immo with a new one ...

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Test clutch switch by jumper

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 also tested the clutch switch by jumper and with the Durametric and its activates perfectly.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Test fuses and even

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 · Original poster

I did test all fuses and even replace the one in the IMMO with a new fuse.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Test still no crank

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 · Original poster

After all the testing still no crank.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options

Use durametric and initialize the fuel pump, fans, etc

No successful repair reported for this finding.

0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 used the Durametric and initialize the fuel pump, fans, etc.

2000 C2 Coup Immobilizer P1571 / 39 code troubleshooting options
Coverage and how to read this overview

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.

0 acknowledgements have no verified action link; they do not establish a repair result.

Generation: 20261026T103553Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

996 Forum members... Before I reach out to one the ECU Repair companies, what are my options in troubleshooting or repairing this code without having to send the ECU/Immobilizer and Key out or diagnosis and repair? The back story to my project is we purchased this 2000 911 in rare zenith blue with know engine issues. After removal and tear down we discovered " bore scoring and spun bearings" about 18+ months ago. Not sure if or when it was last started, but the current owner stated it would start but smoked excessively, etc.. After purchase I sent it off to LN for 3.8 Nickies overhaul and over the past few months assembled the engine with all new parts. This weekend was installation which was pretty easy until it came to startup which didn't happen. I used both my Durametric and Launch v5 both providing P1571 / 39 code " DME can't communicate with Immobilizer, as well as code 42 Wrong key or Wrong pill code. And two other codes 47 - control lock sync and 61 central lock position unlock not reached. The locking system and alarm both work. I have a 99 Cab so I also removed, inspected and cleaned the immobilizer which showed not signs of water or even any corrosion damage. I still cleaned off both sides with contact cleaner. Unfortunately I only have one key with pill. I install a new battery and it flashed red when the button is depressed but it wont unlock either of the doors. The interior central locking button works as well as when the key is inserted into the door locks. I also tested the clutch switch by jumper and with the Durametric and its activates perfectly. I used the Durametric and initialize the fuel pump, fans, etc. After all the testing still no crank. So are there any other options or is sending the ECU, etc...out for repair my only option? John

POST 2Original post

Sending the Immo/DME/Key to ECU Doctor is not the only option but is the best option most likely in your case ... If you had a PIWIS and more importantly the IPAS/programming codes, you could do a few more things like reprogram the key to the Immo or even replace the Immo with a new one ...

POST 3 / ORIGINAL POSTEROriginal post

PorscheTech, I have a clone PIWIS but not any of the IPAS codes. If there is anything else I can do with my PIWIS please let me know. John

POST 4Original post

John unfortunatly without the IPAS codes you really can't do anything with the "Security /Anti-theft " portion of the System ... But there is a 10amp fuse "on" the IMMO its self and a couple more in the fuse box that you need to be sure are not blown and the cause of the codes/no-start...

POST 5 / ORIGINAL POSTEROriginal post

I did test all fuses and even replace the one in the IMMO with a new fuse. Unfortunately the P1571/39 codes always come back immediately after cleaning them and turning back on the ignition. I guess off to Specialized ECU unless there are other options. Plus it would be nice to have a second key. Thanks John

POST 6 / ORIGINAL POSTEROriginal post

Off the Specialize ECUs my parts went today.

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