95 S420 ASR/SRS/Check Engine Light
ASR light comes on in the morning especially when cold, must let it come up to regular temp or I must drive it then shut it off for 3-5 minutes then back to normal. Check engine light coming on too and occasional SRS light too. I will be having it checked out but wanted to know if anyone had some thoughts. Car runs perfect at idle. Only has 112K miles on it. Transmission shifts perfect. I am hoping for something minor.
Unfortunately, could be several factors. But with such different systems showing error light, I would consider (I know by experience):
- Battery condition, these cars need a strong battery.
- Alternator condition, same as above.
Below 11.5 volts on these cars (such as in morning starts), causes these symptoms, as well as a defect in each of these systems components.
-Also consider brake light switch.
-Worst case (wiring harness-mostly engine area, I know that the hard way also)
Best to verify at a shop, condition of battery and alternator, andget the error codes read.
- Battery condition, these cars need a strong battery.
- Alternator condition, same as above.
Below 11.5 volts on these cars (such as in morning starts), causes these symptoms, as well as a defect in each of these systems components.
-Also consider brake light switch.
-Worst case (wiring harness-mostly engine area, I know that the hard way also)
Best to verify at a shop, condition of battery and alternator, andget the error codes read.
High likelihood of Throttle actuator failure usually due to shorting inside the harness, this will throw the ASR and CEL lights. There is also a good chance that the engine harness could be bad (insulation cracking/wires shorting). SRS is likely a seat belt buckle but it is difficult to diagnose anything without a diagnostic test
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Kikoap
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Jul 30, 2012 02:50 PM
Kikoap
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Mar 27, 2012 10:37 PM




