7 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH996 Turbo running issue.
Reported repair
Repair now
Reported resolution
1
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0
Unsuccessful attempts
1
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Discussions that report a fix
1
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Leading evidence: 'Repair now' (1 discussions report resolution; 0 report an unsuccessful attempt). Across 1 matching discussions, The most frequently discussed action is 'Repair now' (1 discussions). For that action, 1 discussions report a resolution and 0 report an unsuccessful attempt. The most frequently reported fix is 'Repair now', supported by resolution reports in 1 discussions. These are forum reports and suggestions, not a confirmed diagnosis.
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Tighten negative battery connection and the cable came off
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
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Performed · outcome unconfirmed · Original poster
Driving back, said specialist hadn’t tightened the negative battery connection and the cable came off.
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Suggestion
If it is below that level and you disconnect the battery, it starts reading from the 1/4 tank level, when you may have much less than that in the tank.
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
The Turbo has DME M7.8, not M5.2.2, so if you have that option on your scanner I would re-run the scan and see what comes up.
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Suggestion
If it is below that level and you disconnect the battery, it starts reading from the 1/4 tank level, when you may have much less than that in the tank.
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.
7 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Club GB: 1 discussions
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Generation: 20261027T070717Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Any advice please. Car has had new ECU as fitted by specialist. Driving back, said specialist hadn’t tightened the negative battery connection and the cable came off. When put back on the car won’t run, at all. Showing error codes as:
M 5.2.2 (OBD)Mode - . Error Message : 3, Static errors:.----- - . Error Message : -----.P0023 - . Error Message : Camshaft "B" timing (bank 2).P1146 - . Error Message : Unknown fault.P1156 - . Error Message : Unknown fault.
Any help would be greatfully received.
cheers!
The Turbo has DME M7.8, not M5.2.2, so if you have that option on your scanner I would re-run the scan and see what comes up.
P1146 and P1156 (for DME 7.8) are O2 sensor error messages. I doubt that these, or the P0023 camshaft sensor error, would stop it from starting, but you could try clearing the codes, and see if they come back.
Educating the driver........! Fuel gauge showed half full, tank was on vapours! Battery terminal cable popping off was just a side issue.
Two weeks in the naughty corner for me, wearing a cone shaped hat with a "D” on it??
You fell foul of the C4/Turbo "saddle" tank. When they go below about 1/4 tank, the level sensor stops reading, and the gauge reading is calculated from there down. If it is below that level and you disconnect the battery, it starts reading from the 1/4 tank level, when you may have much less than that in the tank. Adding 19 litres and more will bring the level back to where the level sensor can pick it up.
https://www.porscheclubgb.com/forum/tm.aspx?m=346360
https://www.porscheclubgb.com/forum/tm.aspx?m=770120
(Section 90 23)
This is a source reference. Confirm exact model applicability in the original material.
