So I have an 01 civic and check engine light is on failed crank shaft position sensor. I have reset ecm I don't know how many times know I lost count. Problem is I can't get the code to reset. New sensor, replaced pigtail plug, no high ohm reading from the wires from sensor to ecm and still in limp mode. I have a Snap On Modus that I have scoped the CKP sensor at the ecm and the signal looks good I think... will the ecm create a false signal in limp mode? I'm at the point of throwing an ecm in it but don't know if that will solve anything.
Any help would be greatly appreciated

 

Hi MrFixIT617: I'm having the same issues with my 01 Acura with 1.7 litre engine. Did you have any luck finding the problem? thx

 

See the attached troubleshooting for an Odyssey which should be similar to Acura EL and Civic...

 

Thanks NDNV. It looks like the crank sensor may be the problem. I'll have to do some more troubleshooting. . .

 

ME too..
Sometime after i got my head gasket changed, with timing belt and water pump, a trouble light came on it was the crankshaft sensor.. and the car stalled and was weak on acceleration and vibrated.. the light went away and its symtoms.. but came back again.. so my mechanic changed the sensor with one i picked on on ebay cheap.. and he put a new female connector on as well.. he checked the timeing and the timing tooth , he also checked the voltage and signal ... and couldnt find any trouble, yet the trouble light crankshaft sensor is still on and the car still has the bad symptoms of it.. the last thing my mechanic said, it may be the cars ecu and to first get the ecu program update .
Im pretty sure it may be electrical related .. what other things can i test or replace ?

My car is a honda civic 2002 ex 1.7 Luckomatic .

 

Maybe the cheapo sensor. I'd go OEM.

 

ok but my mechanic tested the signal and connector , all fine.. he suspects its ECU .. if so, how can i be sure my car is 2002 civic ex 1.7 can i pull one out of a used car same as mine and plug it in?

 

I would just find out your part # for the ECM and match it to a donor ECM.

 

like I said, I tried three after-market sensors. They tested ok when first installed, but then started to exhibit intermittent problems similar to what you've noted above.
I was about to go down the ECM road, then decided to try an OEM crank sensor. That fixed the problem immediately. I've been driving for six months now without a problem. . .

 

Yes but my trouble code never went away and everything seems to exhibit identical symptoms as original sensor.. i don't want to spend more money but need to decide if its the sensor or ECU

 

I my case, the aftermarket crank sensor tested ok when first installed, but intermittently didn't work. After I replaced the sensor, the car started up, but then the light came back on almost immediately along with other similar symptoms to yours. Sorry that I can't help any further.