Nissan P155b-00 !!exclusive!!

If you own a Nissan with a naturally aspirated engine (like the 1.6L or 2.5L), you will likely never see this code. The P155B-00 is a hallmark of the complex variable compression system.

Check Nissan TSB NTB20-045 (for Altima) or ITB20-015 (for Infiniti). If your vehicle falls within the affected VIN range, a dealer can reflash the ECM for 0.5–1.0 hours of labor. This resolves false P155B-00 codes caused by cold-start rationality logic errors. nissan p155b-00

: If the wiring is intact but the code returns, the battery current sensor (part of the negative battery cable assembly on many Nissans) likely needs replacement. Relearn Procedure If you own a Nissan with a naturally