Q: Can I repair the P155B-00 code myself? A: While it's possible to repair the P155B-00 code yourself, it's recommended that you consult a professional mechanic who has experience working with Nissan vehicles.
Multimeter, OBD-II scanner with live data, factory wiring diagram (AllDataDIY or similar).
To understand P155B-00, you must first understand why the A/F sensor has a heater. Unlike a traditional oxygen sensor (which produces a voltage between 0.1V and 0.9V), a wideband A/F sensor requires precise temperature control to operate correctly. The internal heater element warms the sensor to over 600°C (1112°F) within 30 seconds of cold start.
Are you experiencing any or seeing any battery warning lights on your dashboard along with this code? nissan p155b-00
No. P0031 means the heater circuit is low voltage (shorted to ground). P0037 means the heater circuit is low (downstream sensor). P155B-00 is a rationality fault—the ECM sees illogical behavior, not just an open or short.
Q: What does the P155B-00 code mean? A: The P155B-00 code indicates that there is an issue with the throttle control system, specifically with the throttle valve control module.
If the vehicle has had front-end work or a minor impact, the radar sensor may need to be recalibrated. Q: Can I repair the P155B-00 code myself
Essentially, the Powertrain Control Module (PCM) is not receiving the expected response or signal from the radar sensor responsible for measuring the distance between your vehicle and the car in front of you. Common Symptoms
: After replacing the sensor, some Nissan models require a "Battery Registration" or "Self-Learning Reset" using a professional scan tool to tell the ECM a new component is installed. or the specific part number for your vehicle model?
If the sensor tests fine but power is missing: To understand P155B-00, you must first understand why
: Frayed, pinched, or corroded wires in the sensor's harness. Loose Connections : A loose ground or a loose connector at the sensor. 2. Symptoms to Look For Check Engine Light : The primary indicator. Charging System Warning : You might see a battery icon on your dashboard. Dimming Lights
: Trace the wires from the sensor back toward the main harness. Look for any signs of heat damage or rodent chewing. Test the Battery
Has the vehicle had any or aftermarket additions (like a trailer hitch) recently?
The P155B-00 code is often triggered by environmental factors, but can also point to hardware failure.