What does code P1381 mean?

Q: What does code P1381 mean?

CYP Sensor A Intermittent Interruption. P1381 on Honda vehicles means the powertrain control module (PCM) has detected an intermittent interruption in the signal from the CYP sensor A, which is the cylinder position sensor used to identify cylinder number one for sequential fuel injection and ignition timing. The PCM sets this code when the CYP signal drops out or becomes erratic for a brief period, often without the engine stalling.

DTC codes / Honda codes / P1381

P1381 · HondaCYP Sensor A Intermittent Interruption

P1381 on Honda vehicles means the powertrain control module (PCM) has detected an intermittent interruption in the signal from the CYP sensor A, which is the cylinder position sensor used to identify cylinder number one for sequential fuel injection and ignition timing. The PCM sets this code when the CYP signal drops out or becomes erratic for a brief period, often without the engine stalling.

SystemPowertrain

Code typeHonda specific

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for Honda vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.