P0339 2004 Honda Civic - Makes no sense

Asked by Nov 11, 2016 at 02:28 PM about the 2004 Honda Civic DX

Question type: Maintenance & Repair

2004 Honda Civic is throwing P0339 intermittent Crankshaft position 'A'
code.  I've replaced the sensor 2 times, and have a spare ECU.  Nothing is
fixing the problem.  So, I've bypassed the Blue wire on Connector 'A' Pin 7
with a straight wire from the sensor... still P0339 code.  

Put an Oscilloscope on the sensor alone... it's pulsing fine, with a 100ms
gap every 12 pulses with 42 ms pulses on the other 11.  
I'm getting the same with the scope on the bypass wire connected straight
into the ECU.  But it's still throwing the code.

The car will start into Limp Mode with original ECU after about 10 seconds
and the CEL light goes on.  Spare ECU will not go into LIMP mode at all,
but does report P0339....

I'm just lost as to why still getting the P0339 with obvious good signal into
the ECU (unless someone can confirm this is not the correct pulse train).  
After a month with the car down... it's hurting!

5 Answers

122,655

Did you check to see if the Signal plate may be damage?

122,655

you may want to also check that the Starter motor may be faulty, check Starting system circuit and possible weak battery

Battery is fine, starter doesn't seem to show any issues since it cranks without a problem. I don't know where the signal plate is, or what it is... but will google it. I can say the relays (blue, and brown) were also replaced. But the other 2 (both black were not). After clearing the CEL light, I'm not sure if after turning the key is should go out after a few seconds before cranking... but it stays lit. So I don't see the starter as part of the problem (obviously can't rule anything out at this point... but it shows no sign of issue) Will look into the signal plate.

Also want to add... the scope is showing the signal train as 5v p-p, so apparently it is in spec. There is no noise in the signal or random missing of 100 ms pulses (at idle). I didn't find anything online about a signal plate... if you have more information, that would be great.

122,655

this will help, copy and paste/https://www.youtube.com/watch?v=V13pdAIQAik

2 people found this helpful.

Your Answer:

Civic

Looking for a Used Civic in your area?

CarGurus has 44,267 nationwide Civic listings starting at $1,150.

ZIP:

Honda Civic Experts

  • #1
    Tom Demyan
    Reputation
    1,350
  • #2
    Jonathan Ford
    Reputation
    1,080
  • #3
    Takoda Fraser
    Reputation
    1,050
View All

Related Models For Sale

Used Honda Accord
686 Great Deals out of 101,994 listings starting at $999
Used Toyota Corolla
670 Great Deals out of 63,664 listings starting at $1,499
Used Honda Civic Coupe
97 Great Deals out of 10,649 listings starting at $977
Used Toyota Camry
859 Great Deals out of 70,688 listings starting at $1,000
Used Honda CR-V
702 Great Deals out of 75,749 listings starting at $100
Used Nissan Altima
840 Great Deals out of 61,662 listings starting at $1,000
Used Hyundai Elantra
455 Great Deals out of 46,205 listings starting at $1,700
Used Mazda MAZDA3
230 Great Deals out of 23,579 listings starting at $999
Used Honda Accord Coupe
97 Great Deals out of 3,841 listings starting at $1,984
Used Ford Mustang
297 Great Deals out of 39,759 listings starting at $1,312
Used Ford Focus
488 Great Deals out of 76,542 listings starting at $800
Used Volkswagen Jetta
473 Great Deals out of 27,540 listings starting at $1,500

Used Cars For Sale

2018 Honda Civic For Sale
22,108 listings starting at $16,907
2017 Honda Civic For Sale
41 Great Deals out of 2,176 listings starting at $12,990
2016 Honda Civic For Sale
83 Great Deals out of 3,116 listings starting at $10,000
2015 Honda Civic For Sale
172 Great Deals out of 7,454 listings starting at $7,995
2014 Honda Civic For Sale
14 Great Deals out of 1,240 listings starting at $6,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.