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Old 04-21-2002, 10:43 AM
arif's Avatar
Registered User
Join Date: Apr 2002
Location: Los Angeles
Posts: 138
ASR light comes on...loss of power

On my 500 sel (1993) ASR light comes on randomly accompanied with loss of engine power. Only if the engine is turned off and restarted does the light go off and then engine runs normally, until the next random episode occurs. This seems to happen freuently at driving constantly at high speed, i.e. on the freeway. So far has not happened in city driving.
Dealer cannot diagnose this problem and has replaced computer at cost of $3000. Another mechanic has changed throttle actuator at cost of $1000. Still have same problem.
Anyone seen this problem and any ideas?????????
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Old 04-21-2002, 12:40 PM
it leaks, its german
Join Date: Mar 2002
Location: raleigh nc
Posts: 1,111
what codes? have the speed sensors been checked? harness ok, base module ok? which control unit? E GAS?

I've seen this before and have seen bad EGAS's, bad EA's and bad base modules along with bad speed sensors. I had 1 that the harness from the r'h speed sensor had been chewed by a rodent and it would short to the inner fender. I had another one that the customer had done his own brake job and had the speed sensor harness mis routed and rubbing on the control arm until it grounded out.

I've heard of bad exciter rings on the front hubs, damaged rear speed sensor harness's and so, it just needs a through check prefably in a failed state, in other words dont cut it off once it is failed, this way the system dosent reset and diagnosis is a bit easier

Project Smoker, '87 603 powered wagon
Hauler, 96 CTD can you say torque?
Toy 73 Cougar xr7 convertible
Acme Automotive Inc.
Raleigh NC
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Old 04-22-2002, 11:09 AM
Jim's500E's Avatar
Large Member
Join Date: Mar 2001
Location: Manchester, Connecticut
Posts: 1,325
How's your alternator/bushings looking? How many miles on your car? A bad alt could sent a voltage spike causing a problem in the computer.

My 500E went into limp mode and it turned out to be a $10 brake light switch that was causing it...that and the alt was one the way out at 130,000 miles.

1992 500E
2007 CLK63
2003 Audi RS6
2001 Audi allroad
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Old 04-22-2002, 12:00 PM
n2lw's Avatar
Registered User
Join Date: Jun 1999
Location: Smith Mt Lake Va
Posts: 119
Do a search under "limp home" and "asr"
This is a known problem which seems to have many potential causes.
92 500e, 85k, silver/gray,all stock.
96 Club Wagon,Hypertech chipped( College Hauler)
97 320 SL 50k
1980 BMW e21 323 Baur conv.
1990 300GE 99k
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Old 04-23-2002, 12:21 AM
arif's Avatar
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Join Date: Apr 2002
Location: Los Angeles
Posts: 138
don't know condition of alternator but will have it checked out. Car has 126k miles.
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