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YOUR RESEARCHBattery Changed and now have PSM and ABS Lights on
Leading reported evidence
Disconnect battery
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Performed · outcome unconfirmed
I had the same happen when I disconnected the battery to change the steering wheel a couple of months back.
Battery Changed and now have PSM and ABS Lights on
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Leading evidence: 'Disconnect battery' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check brake lights' (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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Battery Changed and now have PSM and ABS Lights on
Check lights first
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Suggestion · Original poster
I will try the actions suggested above and check the lights first before I use up your valuable time.
Battery Changed and now have PSM and ABS Lights on
Check would also show
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Suggestion
A diagnosic check would also show that, if it were the case.
Battery Changed and now have PSM and ABS Lights on
Disconnect battery would cause it
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Suggestion
It coult be what Alan says - brake pedal switch is a favourite - but I think it unlikely that disconnecting the battery would cause it to play up.
Battery Changed and now have PSM and ABS Lights on
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Can someone give me some advice.
After changing the battery my PSM and ABS lights are on all the time. I have read that driving it helps but the 60 miles I covered today and they are still on.
I cant think what else it could be?
Regards
Matt
Try checking the brake lights. I think if a filament has gone it can bring those lights on (bizarre but apparently true!) And the brake light switch can cause problems too. Also did you do the DME reset? Ignition on for 1 minute without starting and then off for 10 seconds. Don't know about the 996 but on the 997 the steering angle sensor needs recalibrating after a battery change too, I think.
The Guru will be along shortly, no doubt, to tell you what you should be doing![
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You shouldn't need to reset the ABS/PSM after a battery disconnect on a 996. You can try the procedure for a 997, but I don't think it will do anything. http://www.porscheclubgbforum.com/tm.asp?m=770011
I suspect that Gordon is correct, and it needs diagnosing/resetting with a Porsche tester. If you are near me, I'd be happy to do it for you. It coult be what Alan says - brake pedal switch is a favourite - but I think it unlikely that disconnecting the battery would cause it to play up. A diagnosic check would also show that, if it were the case.
Thanks Richard and All,
I'm not too far away in Surrey and would love to take you up on the diagnostic and to meet the great man himself. I will try the actions suggested above and check the lights first before I use up your valuable time.
Many thanks
Matt
What voltage reading are you getting with the engine switched on and off? If the battery you put in isn't powerful enough PSM and ABS may start to play up (assuming a faulty alternator/diode pack wasn't the real reason behind the original power loss)
I had the same happen when I disconnected the battery to change the steering wheel a couple of months back. The lights kept coming and going but I haven't seen them on for a few weeks now. Hopefully it's job done
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