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Fault code 31
  #1  
Old 01-07-2010, 02:26 AM
OBR4 OBR4 is offline
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Default Fault code 31

Hi Guys,

I have been having trouble with my 03 navara, the engine light flashes when i turn the car on and i can get rid of it by turning the car on and off twice. This doesnt happen all the time only randomly.
I took in to a mechanic and the plugged in a tester and told be it was a fault code 31.
I was just wondering if anyone would be able to tell me what that code means, I did try ring a nissan service centre but didnt seem to want to help

Cheers for your help
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Old 01-07-2010, 02:38 AM
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pays to mention what motor you have.

also you will need to take it to nissan as i'm guessing the mechanics reader doesn't work with these, simply because theres no such thing as "fault code 31"
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  #3  
Old 01-07-2010, 10:54 AM
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Sorry it is a 3.0 ltr turbo diesel, ZD30
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Old 01-07-2010, 11:57 AM
KraftyPg KraftyPg is offline
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There is a list of generic OBDII trouble codes (which as the name suggests are generic to all OBDII vehicles) and several of them have 31 in them but none have just those two numbers, they usually have several numbers and a letter to distinguish what they relate to.
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Old 02-07-2010, 12:18 AM
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trouble is the ZD30 isn't fully OBDII compliant, they don't use generic OBDII codes. hence the need to use nissans reader or a reader that specific to that model.
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Old 02-07-2010, 06:43 AM
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According to the Diagnostic Trouble Code section for the ZD30DDT there is NO code 31. Doesn't mean it isn't there of course, the service manual that Nissan use doesn't have to be complete.

On the KA24, error 31 is for HO2S1 HTR (B1) which in English means "The current amperage in the heated oxygen sensor 1 heater circuit is out of the normal range. (An excessively low voltage signal is sent to ECM through the heated oxygen sensor 1 heater.)".

The cause of that is either a faulty harness or faulty sensor.
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Old 06-07-2010, 10:46 AM
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just a thought, could possibly be code 0301 ecu malfunction.
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  #8  
Old 06-07-2010, 01:00 PM
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Hi all, i have EXACTLY this same problem. However sometimes it disapears for ages then it comes back and wont go away, even after starting the engine multiple times. However it does seem to co-incide with low fuel, which makes me think it may be due to needing to flush the fuel pump (same engine also). im not sure that it will go away with a full tank of diesel but im going to fill up tomorrow so ill keep you guys posted
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Old 06-07-2010, 10:52 PM
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if its only with low fuel, check for air in fuel lines and how hot the fuel tank gets.

the other thing is to check your earths. i actually fitted an extra earth from body to chassis, from middle/rear of cab to gearbox cross member. i think it was the frontiers and some of the patrols which suffered a problem with body not earthing to well to the chassis and causing issues with rear lights and fuel tank senders.
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Old 07-07-2010, 06:19 AM
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^ Gu's had the earthing problem and it usually caused the sub tank to not work.

As Tweak'e said check for air in the lines, the primers in D22's are known to get a bit average. Mine has never had an issue but I have heard of many.

Dave.
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