1998 civic LX 270000kms (rolled that yesterday), 5 spd sedan.
This car has been bulletproof since I bought it new... never had a major
problem that was not covered by a TSB or warranty.
I am having what seem to be a number of unrelated issues.... am hoping this
is nothing too major...
Drove home in a major snow storm last night. Car performed well, and we got
The next day, I started it normally, but the CEL came on, and the speedo was
whacked (even at a standstill). Every time I reved up the engine, the speedo
went for a loop, going all over the place with no real logic, from 0 to 220
and back. Very weird.
Next, I noticed that there was a slight surge in the idle. This was not
there before. I decided to take it to the store to see if it would clear
itself up.... perhaps some moisture found its way where it was not supposed
to? Inspected all connectors visible under the hood, nothing appears out of
Have read that the whacky speedo problem can be caused by a grounding issue
and alternator issues. Checked my ground cable and VOILA! the clamp was
loose on the battery. Stuffed a nail in there and tightened her up... still
surging like crazy.
Ran my multimeter across the terminals at idle, it ranged from 12.4 - 12.8
volts.... a touch low... ?
I also found my code reader under the seat... so i plugged that in... it
threw P0135 and P0141. Primary and Secondary O2 sensor malfunction..... Let
the codes clear and they came right back.... what the hell?
-Car surged at idle very mildly.
-Negative battery cable was loose. Tightened. No more surge that I could
-Voltage across battery terminals 12.4 - 12.8 volts at idle. (couldn't rev
it up as I had no assistance).
-Codes P0135 and P0141 for Primary and Secondary O2 sensors won't go away.
What could the above have to do with each other? What would you do to
diagnose this problem correctly?
I decided that I would give the battery a charge... if the alternator is
struggling, perhaps that would help... I will let it sit for a couple hours
and see where we end up.
Any input appreciated!
Terry in Winnipeg.
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