I am driving a 2007 HR 350z. I currently installed a (Random Technology) High Flow Cat and installed 2 new 02 sensors. Everything were working well until I drove for around 50km. The engine light came on. So I thought I need to install an 02 extension, so it won't get too rich for the sensor. I reset the engine light, and it came up again after 30km. The engine code are P0430 and P2A00. Anyone know whats the problem? By the way, I didn't install any gasket attached to the header. Do you think this is the reason? THANKS

 

I recently cured this code myself, try searching on Google

Reply 2: P0430 Error Code
sliderg35 replied 2 years, 5 months ago
Wow, that one is a bit of a monster to diagnose... The service manual says to check: exhaust system, exhaust gas leaks, intake air leak, ignition timing, injector voltages, ignition spark and injector leaks. Any one of those could cause the code. I assume you cleared to code and it came back (clearing the code is always your first step to see if the problem is intermittent.) The O2...




- Scan Tool
If using a scan tool, follow tool manufacturer’s instructions to clear Codes.

- Manual Method
Here is a quick way to reset your ECU. It is also known to clear codes thrown, and turn off the "Service Engine Soon" Light.

Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
Repeat the following two procedures quickly five times within 5 seconds:
Fully depress the accelerator pedal (HARD).
Fully release the accelerator pedal.
Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the CEL starts blinking.
Fully release the accelerator pedal (while the CEL is still blinking)
Wait about 10 seconds.
Fully depress the accelerator pedal and keep it for more than 10 seconds.
Fully release the accelerator pedal (The CEL light will continue to blink).
Turn ignition switch to “OFF” position and now you can start the car. The CEL light should be gone.

- With Consult

Turn ignition Off.
Connect Consult’the data link connector (DLC), located behind fuse box cover.
Turn ignition On.
Touch Start.
Touch Engine.
Perform each diagnostic test mode according to each service procedure.

- Without Consult
Turn ignition On.
Turn diagnostic mode selector on ECU fully clockwise and wait until inspection lamps flash. #Number of flashes displayed indicates corresponding mode.
Note number of flashes, then immediately turn diagnostic mode selector fully counterclockwise.
If ignition is turned Off during diagnosis, in each mode, and then turned back on again after power to the ECU has dropped off completely, diagnosis will automatically return to Mode I.
For description of modes, proceed as follows:

(Mode I): with engine stopped, system in bulb check state. with engine running, system in malfunction warning state.

(Mode II): with engine stopped, system in self diagnostic results state. with engine running, system in front O2S monitor state.


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Classification: Reference: Date:
EC02-021a ITB02-050a January 22, 2003
2001 QX4 MIL ‘ON’ WITH DTC P0420/P0430
BANK-1/BANK-2 CATALYST
IMPORTANT: THIS BULLETIN HAS BEEN REVISED.
“Chart A” on page 2 was revised by changing the “Built from” date to 8/2/00 instead of 8/2/02.
Please discard previously distributed copies of ITB02-050.
Use this bulletin ITB02-050a for complete information.
APPLIED VEHICLE: 2001 QX4 (JR50)
SERVICE INFORMATION
If an applied 2001 QX4 has a MIL "ON" and either or both of the following DTCs stored in the ECM:
P0420
P0430
Use the appropriate Service Procedure steps to determine if the bulletin applies to this vehicle. If the bulletin
applies, complete the applicable Service Procedure steps to repair the incident, if it should occur.
SERVICE PROCEDURE
You will perform the following, as required:
Determine the DTC Stored in the ECM from the CONSULT-II Self-diagnosis results.
ECM Part Number Check to determine if this bulletin applies.
ECM Reprogramming (required if the ECM P/N in the vehicle matches one of those listed under “Current
ECM P/N” in Chart A - page 2).
IMPORTANT: Do NOT replace the catalytic converters as part of this procedure.
2/3
Determine the DTC Stored in the ECM:
1. Determine which DTC code is stored in the vehicle's ECM by performing CONSULT-II Self-Diagnosis.
2. Print out the Self-Diagnosis results for use in ECM Part Number Check, below. See Figure 1 for an
example of the CONSULT-II Self-Diagnosis printout.
Figure 1
ECM Part Number Check
1. Compare the vehicle's current ECM P/N (from your CONSULT-II Self Diagnosis printout) to those shown
under Current ECM P/N in Chart A, below:
Chart A – Current ECM P/N's:
Vehicle Model Year Vehicle Configuration Current ECM P/N
Built before 8/2/00:
2001 A/T 23710-4W000, -4W001, -4W002
Built from 8/2/00:
A/T 23710-4W020, -4W021, -4W022
A. If the ECM P/N in the vehicle matches one of those listed under "Current ECM P/N" in Chart A
(above):
Look in the “Vehicle Configuration” column in Chart A (above) and determine the vehicle
“configuration.” Make a note of the vehicle configuration and perform ECM Reprogramming on
page 3.
B. If the ECM P/N in the vehicle does not match one of those listed under "Current ECM P/N" in Chart A
(above):
This bulletin does not apply. Use the appropriate Electronic Service Manual (ESM) to further
diagnose and repair the incident.
SELF-DIAG RESULTS
SYSTEM ENGINE
DATE 09/01/2002 12:07:11
P/N 23710-4W001
DTC
Code
TP020016a
DTC RESULTS TIME
TW CATALYST SYS-B1
Current
ECM Part
Number
TW CATALYST SYS-B2 5
[P0430]
[P0420]
5
3/3
ECM Reprogramming
1. Perform ECM Reprogramming to install the latest available ECM data.
If you are unfamiliar with ECM Reprogramming, click here to link to the "ECM Reprogramming For Infiniti
Vehicles" general procedure or refer to "ECM Reprogramming For Infiniti Vehicles" in the print copy of this
bulletin.
For those familiar with ECM Reprogramming, perform the following:
Figure 2
A) Select model and model year for the applied vehicle (i.e. QX4, 2001).
B) Locate the vehicle configuration, you made note of in step 1A on page 2, from those listed in the upper
right ECM data description window.
C) Make a note of the “To” number listed in the “ECM Reprogramming Data” Summary screen.
NOTE: The “To” number will read: 23710-XXXXX.
D) Press “Continue” and follow directions to perform data download from ASIST to CONSULT-II.
E) When reprogramming from CONSULT-II, select the “To” number that you made note of in step C,
above.
2. Use CONSULT-II to do the following:
Confirm DTC P0420 and/or P0430 is repaired.
Erase the DTC code(s).
CLAIMS INFORMATION
Submit a Primary Failed Part (PP) line claim using the following claims coding:
DESCRIPTION PFP OP CODE SYM DIA FRT
Reprogram ECM per TSB (1) DE98AA HD 32 0.7 hrs
(2)
1. Reference the final CONSULT printout and use the indicated ECM P/N as the PFP.
2. Includes sufficient CONSULT diagnostic time – do not claim any other diagnostic Op
Code on this claim.
KeyPad
Back
Up
CODE
(per TSB only)
Main
Menu
Summary
Update for Models before 8/2/00
To 23710-XXXXX VQ35 AT
Replaces 23710-XXXXX, -XXXXX
More
I30
Q45 2002
More
NOTE: Example only, your screen may differ. TP020025a
QX4
G20
2001
2000
1999 Summary
screen
Update for Models from 8/2/00

 

Thanks..........by the way, do you know if the engine light came on. Will it affect the performance of the car?

 

Apparently NISSAN engineers think so.

 

sounds like there's a leak from your hfc install since you didn't use the gaskets. I'd take to Ed at aph to get it checked out/installed

 

Super Confusing !

 

Coles notes:

-install the gaskets to eliminate your exhaust leak which is throwing you the codes

- use an obd 2 scan tool to erase the codes

- the end

 

Use gaskets.

 

but the stock downpipe didn't have the gasket either..........!

 

ask ur friend get to the side of your car and rev it, see if it is leaking, if not, install an o2 extension?

 

If you don't know... Take your z to someone who is capable of helping you.

/Thread

 

I think there is a leaking of the downpipe.......because I already install the 02 extension........!

 

/Thread
p0430 = put stainless steel wool in the cat's o2 bung
P2A00 = Exhaust leak near header/cat on passenger side

I just dealt with this and I told you that in your other thread! Take it to SG Motorsport in Brampton 905-463-1483

 

Ok thanks..........then do you know whats P0420?

 

Its the same as P0430... But the drivers side. p0430 is drivers side p0420 is passengers side. You need to put stainless steel wool in the cat's o2 bungs. Or fix your leak maybe?
https://my350z.com/forum/engine-and-...ix-read-5.html
Stop asking questions and go to SG to get it straightened out. /Thread