What does code P1406 mean?

Q: What does code P1406 mean?

Turbo Pressure Sensor Range Performance Problem. P1406 on Toyota vehicles indicates that the engine control module (ECM) has detected an out-of-range or implausible signal from the turbo pressure sensor, which measures boost pressure in the intake system. The ECM compares this signal with expected values under specific operating conditions and sets the code when the sensor's performance does not match the model.

DTC codes / Toyota codes / P1406

P1406 · ToyotaTurbo Pressure Sensor Range Performance Problem

P1406 on Toyota vehicles indicates that the engine control module (ECM) has detected an out-of-range or implausible signal from the turbo pressure sensor, which measures boost pressure in the intake system. The ECM compares this signal with expected values under specific operating conditions and sets the code when the sensor's performance does not match the model.

SystemPowertrain

Code typeToyota specific

SeverityMedium

Fix difficultyIntermediate

AreaAuxiliary emission controls

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