1. Buy A Compatible SDR USB Dongle (Based On The Realtek RTL2832U)
   [Compatible Tuners: E4000, R820T, R820T2, R828D, FC0013, FC0012, FC2580, ...]
   See Compatible Tuners/Dongles: https://osmocom.org/projects/rtl-sdr/wiki/Rtl-sdr


2. Open A Shell And Install SDR Tools (Here Only "rtlsdr", "gqrx" And "cubicsdr") With This Commands :
   
   #> apt-get update
   #> apt-get install rtl-sdr librtlsdr-dev gqrx-sdr cubicsdr


3. Blacklist Module(s) :
   - Edit The "/etc/modprobe.d/blacklist.conf" File (Here With "Vim" But You Can Use Any Editor) :
   
   #> vim /etc/modprobe.d/blacklist.conf
   - Add At The End Of File This Lines (You Can Add Others If You Want) :
   
   blacklist rtl8xxxu
   blacklist dvb_usb_rtl28xxu
   blacklist dvb_usb_v2
   blacklist rtl_2830
   blacklist rtl_2832
   blacklist r820t
   - Save And Close "/etc/modprobe.d/blacklist.conf" File
   - Reboot PC


4. After Reboot, (If Unplugged) Plug Your SDR USB Dongle
   To Watch Your SDR USB Dongle, enter command :
   
   #> lsusb | grep -i rtl
   [ OR ]
   
   #> dmesg
   [ OR ]
   
   #> dmesg | grep -i rtl


5. And Just Start "gqrx" (From A Shell Or Menu)
   [If You Want Reset "gqrx" Configuration, Run This Command On A Shell "gqrx -r"]


6. If You Prefer, Instead Of "gqrx", You Can Also Start "cubicsdr"...


7. For More..., Install GNURadio:
   
   #> apt-get install gnuradio gnuradio-dev

Nissan P155b-00 High Quality -

What does it have (e.g., 1.5 dCi diesel, 2.0L gasoline)?

If you actually meant P0155 (which is a very common O2 sensor heater code), that's a different story involving your exhaust and fuel efficiency.

Check with a Nissan dealer using your VIN to see if your vehicle qualifies for a warranty extension or free repair—especially if you are under 80,000 miles.

Ignoring this code may lead to decreased vehicle performance, reduced fuel efficiency, and potentially cause further damage to the engine or other components.

Checking the linkage between the actuator and the turbocharger. If the arm is stuck and cannot be moved by hand (with the actuator disconnected), the turbo vanes are physically seized. nissan p155b-00

The engine's computer (ECM) has detected that the heater responsible for keeping the AdBlue fluid from freezing or maintaining its operating temperature is not performing correctly.

: Open or shorted circuits in the wiring harness connecting the Engine Control Module (ECM) to the battery heater relay. Blown Fuse

Using contaminated or old Diesel Exhaust Fluid can trigger SCR-related codes. Troubleshooting and Repair Steps

When the engine is cold, the bypass valve directs coolant to recirculate within the engine block, bypassing the radiator. This helps the engine reach optimal operating temperature faster—improving fuel economy and reducing emissions. Once the engine warms up, the ECM commands the valve to open and allow coolant to flow through the radiator. What does it have (e

Before buying parts, check the wiring harness and connectors for any signs of fraying, melting (from exhaust heat), or corrosion.

Trace the ground wire from the battery terminal down to the vehicle frame. Ensure it is clean, tight, and unoxidized.

: Use your scanner to clear the active DTC. Drive the vehicle through a complete Nissan drive cycle—including a mix of steady highway driving and stop-and-go city traffic—to confirm that the ECM clears its internal monitors and the Check Engine Light remains off.

The fault code typically refers to a malfunction within the Selective Catalytic Reduction (SCR) system , specifically involving the Reductant Heater Control Circuit or a general SCR system fault . This code is most commonly seen in modern Nissan diesel vehicles, such as the Navara NP300 , that utilize AdBlue (Diesel Exhaust Fluid) to meet strict emission standards. What Does P155B-00 Mean? Ignoring this code may lead to decreased vehicle

Often, it's just a faulty glow plug relay that has burnt out.

In this complete guide, we will break down every aspect of the code, from its technical definition to step-by-step diagnostic and repair procedures.

Comprehensive Guide to Nissan DTC P155B-00: Energy Management Control Understanding Nissan’s Smart Energy Management System

Several underlying issues can trigger this DTC. In our experience repairing Nissans, here are the most common culprits:

The SCR system components are located under the vehicle and are exposed to road debris, water, and heat, which can cause corroded or broken wires.

“P155B-00,” she whispered, the words fogging in the cold air. Leo’s service manual, dog-eared and coffee-stained, lay open on the passenger seat. She’d traced the diagnostic tree three times. Check the wiring harness. Inspect the battery current sensor. Measure voltage drop. Everything pointed to a single, tiny component: a hall-effect sensor clamped around the high-voltage cable leading to the main battery.

1. Follow A "Quick Start Guide" To Setup Your Dongle/Software... (Depends Of Your OS, See Before)
   [And (If Unplugged) Plug Your SDR USB Dongle]


2. Method 1: With "rtl-sdr":
   - If You Are On Windows, You Can Download From This Link (Download The Latest Version 32 Or 64 Bits):
   https://downloads.osmocom.org/binaries/windows/rtl-sdr/
   (And Unzip Anywhere)
   
   - If You Are On Linux (Debian/Ubuntu), Just Install Package With Shell Command :
   
   #> apt-get install rtl-sdr
   
   - Now Open A Shell (Or "cmd.exe" For Windows, And Go To Unzipped Binaries Folder) And Enter This Command :
   
   #> rtl_test -p
   
   - Wait Some Minutes (At Least 5 Or 10 Minutes) And Watch Results (You Can Stop With "CTRL+C") :
   On Results You Have Some "cumulative PPM: XX" Values (XX Is A Number, And Can Be A Negative Number)
   To Find Your SDR USB Dongle "Frequency Correction (ppm)":
   Keep Most Frequently "cumulative PPM: XX" Value (Or Make An Average Of Last "cumulative PPM: XX" Values)
   
   - In The Example Below, After A Few Minutes, I Decide To Keep The Frequency Correction (ppm) => "51":
   


3. Method 2: With A Software (Maybe More Or Less Precise):
   - If You Are On Windows Start "SDR#", But If You Are On Linux Start "gqrx"
   
   - Put The "Frequency Correction (ppm)" To "0" On Your Software (Search On Software Parameters...)
   [On Windows And "SDR#", Click On "Gear" Icon On Top Named "Configure Source", You Have "Frequency correction (ppm)"]
   [On Linux And "gqrx", Select "Input controls" Tab On Right, You Have "Freq. correction"]
   
   - Enter A Precise And Fixed Frequency That You Know (A Fixed Frequency From : FM Radio, Narrow FM, AM...)
   [If You Don't Know A Precise Fixed Frequency, Make An Internet Search To Find One]
   
   - Now Adjust The "Frequency Correction (ppm)" From Your Software Parameters, To Center On The Fixed Signal
   [And Find Your SDR USB Dongle "Frequency Correction (ppm)"]

1. (If Unplugged) Plug Your SDR USB Dongle


2. (If Not Installed), Install Packages:
   [ "rtl-sdr" For "rtl_fm" command, "sox" For "play" command, "alsa-utils" For "aplay" command ]
   
   #> apt-get install rtl-sdr sox alsa-utils


3. Method 1: Run Command (Output Audio With "play"):
   [ Replace "-f 99.6M" By A FM Radio Frequency, And "-p 51" By Your PPM Correction ]
   
   #> rtl_fm -f 99.6M -M wbfm -s 200000 -r 44100 -p 51 | play -t raw -r 44100 -es -b 16 -c 1 -V1 -


4. Method 2: Run Command (Output Audio With "aplay"):
   [ Replace "-f 99.6M" By A FM Radio Frequency, And "-p 51" By Your PPM Correction ]
   
   #> rtl_fm -f 99.6M -M wbfm -s 200000 -r 44100 -p 51 | aplay -r 44100 -f S16_LE -t raw -c 1