:confused: I'm really fed up of my Z going into safety boost mode! It's now always stuck in safety boost & having done a ECU flash code check today i'm getting a dreaded code 34!! Have checked all the wiring to the Det sensor & it's all ok, the only thing I have got is a dead T.P.S Throttle Position Sensor - would the cause my Z to give a code 34 and activate perminent Safty boost??? :headvswal Have tried ECU reset etc but still no joy.. I don't want to bypass the Det Sensor so is my only option to goto the hassle of stripping off the top instakes and install a new Det Sensor?? Is there such a thing as an easy way to install a new det sensor??!! Somebody please help!!

:confused: I'm really fed up of my Z going into safety boost mode! It's now always stuck in safety boost & having done a ECU flash code check today i'm getting a dreaded code 34!! Have checked all the wiring to the Det sensor & it's all ok, the only thing I have got is a dead T.P.S Throttle Position Sensor - would the cause my Z to give a code 34 and activate perminent Safty boost??? :headvswal Have tried ECU reset etc but still no joy.. I don't want to bypass the Det Sensor so is my only option to goto the hassle of stripping off the top instakes and install a new Det Sensor?? Is there such a thing as an easy way to install a new det sensor??!! Somebody please help!!

 

yep mate,there is a way of fixing it to the top of the block instead of in the block.it works by bolting a long stud to the back of the engine roughly where the sensor is and fixing the sensor on top of the bolt,it still picks up the dettin frequency as normal------ask one of the mechanic guys on here iff they do it

relocating the det sensor is not a good idea IMO. it works on frequency of sound, moving it to another place could change that frequency & it may not pick up det.

Nissan engineers put it there for a reason, if your gonna do the job then do it properly ;)

i had this problem the other day, although the wiring is fine, the sensor itself could be faulty, i was measuring 500k ohms across the sensor and would have expected double that on a healthy sensor. if you havnt done it, make sure you have +4.8V on the ecu side. i know its not ideal, but without stripping the engine down, only way is to bypass it. ive had no problems with detanation since bypassing it but i have a standard engine running only exhaust and intake mods, and always use top quality fuel so little chance of detenation happening.

are you positive the ecu is deffinately reset? leaving the battery off over night didnt clear mine and gave me a bit of a headache with a non existing temp.sender fault that i had already fixed, until i learned that shorting the ign/chk wires for 2 secs whilst in diag mode wipes it properly.

i wouldnt recommend moving the sensor, as your trying to detect a minute noise in relation to the rest of the engine noise, so in order to pick it up clearly its been positioned there to avoid interference from other moving parts. extending it with a rod may absorb the noise and make it less effective. just a thought some one may correct me that knows better

Have left the battery disconected for 2 hours, thought that might have cleared the ECU!! So what exactly do I need to do to wipe off all the error codes??.. The engine I've got has only done 40,000 miles so I'm hoping the det sensor isn't faulty!!!

Your error codes will dissapear after resetting the ECU, but as soon as you start up again the error code will come on again is the sensor is faulty. I'd have thought its more of an age issue than mileage.

when you enter diagnostic mode2 by shorting the ign/chk pins on the consult plug for 2 secs with the ignition on, the light will flash with the codes. to clear them short the ign/chk again for 2 secs and the check light should stay on as normal. this is you out of diagnostic mode and into normal mode. without restarting the engine repeat the prosess and hopefully you should get a code 55 (all healthy) exit the diag mode as before, and start the engine for a few minutes. Re check the codes and see if the 34 comes back, if it doesnt it might take a wee bit of driving about before it comes on. remember to exit diag mode each time that will clear the memory. (dont just do what i used to do and turn off the ignition for a few seconds.)

Thank's everyone you've all been more than helpful as norm!! I will try the above but fear the worst for a faulty det sensor!! Just worried that when I get it replaced i'll still get the same error code!!!

Code 34 is definatly Det sensor. Nothing else can cause it. It means Faulty sensor, or a break in the connection between sensor, harness and ecu.

 

The best way to test it is to bypass it with a 1 megohm resistor. There are instructions on here, and its very quick and easy to do.

 

You can either leave the bypass in there, or cough up the money to get it replaced.