Z1Motorsports Like us on FaceBook!
2877 Carrollton - Villa Rica Hwy
Carrollton, GA 30116
770.838.7777
info@z1motorsports.com
  Top » Catalog » OEM Z32 Parts » Engine Electrical » Oxygen & Knock Sensors » My Account  |  Cart Contents  |  Checkout   
Categories
300zx PerformanceOEM Z32 PartsAxle & SuspensionBody (Side & Rear)Body ElectricalBody(Frt, Roof, Floor)BrakeEngine ElectricalAlternatorCrank Angle SensorEngine Control ModuleEngine coolant temp sensorsIgnition SystemOxygen & Knock SensorsStarterVacuum PipingEngine MechanicalExhaust & CoolingFuel & Air DeliveryMiscellaneousPowertrainSeat & Seat BeltSteeringConvertible PartsDiscontinued PartsJDM Z32 PartsUsed Z32 PartsUsed Performance PartsZ1 Decals, Shirts & HatsZ32s for SalePersonalized Quotes
Navigation
Z32 Home
Service & Repair
DynoJet Services
Newsletter
About Us
Links
Events
Find Us
Cars For Sale
Z1 300ZX Site
Z1 350Z/G35 Site
Z1 370Z/G37 Site
Z1 240SX Site
Z1 GTR Site
Specials more
Z1 Howe TT Radiator
Z1 Howe TT Radiator
 $328.00  $315.00 
Image Gallery
Z1 in the News
Feature Cars
Customer Cars
Z1 Cars
Dyno Charts
Event Pictures
Shop Pictures
Image Gallery Home
 
Information
Shipping & Returns
Privacy Notice
Terms and Conditions
Contact Us
Track a Return
Gift Voucher FAQ
Shown here before the protective coating has been applied
Shown here before the protective coating has been applied

Knock Sensor Bypass Plug

  

 

This Knock Sensor Bypass Plug connects directly to the EFI Harness where the Knock Sensor Sub Harness would normally connect near the back center of the intake manifold. 

This can be used to clear a Code 34 to verify the knock sensor circuit is working properly and the issue lies with the sub-harness or knock sensor itself.  This is not recommended to be used to permentately eliminate the knock sensor as the knock detection system is an important part of the 300zx's Electronic Control Unit.  

A diagnostic trouble code 34 generated by the ECU means that the circuit for the detonation sensor is broken, not that the ECU has "heard" detonation.  The ECU is always looking for a resistance in the detonation sensor circuit of around 1 mega-ohm.  If this resistance is not present the ECU throws a code 34 and also goes into a self protection mode in which ECU switches to more conservative safety maps with less timing and more fuel as well as lowers the boost level on Twin Turbo models by opening solenoids that normally bleed off some of the pressure to the wastegate actuators.  The faulty part in the detonation sensor circuit is usually the sub-harness between the sensor itself and the EFI harness.  Corrosion on the terminals of the connector between the sub-harness and the detonation sensor is usually the cause of a code 34.  Z1 sells the detonation sensor sub-harness HERE.  Now that Z32s are surpassing 20 years old, this system that was designed to help protect your engine from damage from things like low grade fuel often fails and results in poor performance and fuel economy even though there is no detonation taking place. 

The detonation sensor is located on top of the cylinder block in the valley between the heads under the intake manifold.  It is difficult to change or even clean the connections on unless you have your engine apart. Using this Bypass Plug, it is possible to eliminate a code 34 by tricking the ECU into believing the circuit is OK.  This Plug consists of a 1 mega-ohm resistor which crosses the two terminals that attach the detonation sensor sub-harness to the main engine EFI wiring harness.  This will eliminate the Code 34 allowing your ECU to function as normal, but will eliminate the self protection function of the detonation sensor altogether.  Nissan included the detonation sensor for a reason, so it's not recommended to eliminate it unless you are clear on how to minimize the risks. 

 $16.00 

  Reviews
Customers who bought this product also purchased
New Style PTU Mounting Bracket
New Style PTU Mounting Bracket
Mishimoto Z32 TT Performance Radiator
Mishimoto Z32 TT Performance Radiator
OEM Rear Main Seal
OEM Rear Main Seal
5/16" Submersible Fuel Hose (per inch)
5/16" Submersible Fuel Hose (per inch)
Energy Suspension Z32 Front Sway Bar Bushings
Energy Suspension Z32 Front Sway Bar Bushings
JDM Clear Turn Signal Lenses (Corner Lights) Pair
JDM Clear Turn Signal Lenses (Corner Lights) Pair
Shopping Cart more
0 items
$0.00
Specials more
Z1 Eprom Chip
Z1 Eprom Chip
 $200.00  $100.00 
Location more
Z1 Grand Opening
Z1 Grand Opening
Take a look at a few pics from the Grand Opening of Z1's location.
Feature Event more
<br>

Click Here for Details.
Manufacturer Info
Z1 Motorsports Homepage
Other products
Notifications more
NotificationsNotify me of updates to Knock Sensor Bypass Plug
Tell A Friend
 
Tell someone you know about this product.
Core Program more
Core Program
Core Program
Turn in Cores for Z1 Store Credit.
With over 100 parts cars, Z1 Motorsports has the largest selection of used Z parts on the planet. Motors, Transmissions, body parts, down to trim pieces, nuts, and bolts. Our used parts ship daily all over the world.

E-mail parts@z1motorsports.com or call 770-838-7777 for all your used parts needs.

Z1 Z32 Specialists

Visa, Mastercard, Discover Accepted 128 Bit SSL
Shipping and Returns
Electronic Commerce
Privacy Notice Conditions of Use Contact Us