Question about 1997 Mercedes-Benz E-Class
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Posted on Jan 02, 2017
SOURCE: Secondary air supply failure
Have the same problem on a 2004 envoy. Was told by my very reliable mechanic that the cause for this is the pump being exposed to the element too much, and it shorts out eventually, a very common problem with this car. Apparently the pump is on the chassis driver side and can easily be removed and replaced, and when removed, a person can hook a 12 volt battery directly to the pump to test if it's working or not before unnecessarily replacing a good part. This part is for emissions only and it's failure does not affect engine performance or milage.
Posted on Jan 03, 2009
SOURCE: My 2004 Trailblazer's
Take it to a mechanic... :P
On a more serious note, though, check any of the intake manifolds for cracks or loose bolts, then have someone reset the EC error messages. If it happens again then worry about it, if not then don't! Often enough cars will post crazy messages just to annoy you, not because there's anything wrong :p
Posted on Aug 04, 2009
By having it scanned and cleared with an OBD tool. This light comes on when it detects a problem. Could be a bad gas cap, or it could be a misfiring engine. The code you get from having it scanned will pinpoint the trouble area
Posted on Sep 08, 2009
get yourself a wiring diagram to see what powers up the relay, it is a fuse, have you checked the fuses? also these pumps short out and that is why it is not working and blown out the circuit, replace it before you do anthing, also remember that the pump is powered up by the PCM only during cold start, so 99% of the time it has no power to it.
Posted on Sep 15, 2009
Testimonial: "very helpful, the valves were the problem vacuum leak inside very small but your advice was appreciared and helped me, GM supplied me with bulletins t"
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