Code Definition

P1346 — Left Variable Valve Timing Sensor or Camshaft Position Sensor circuit out of range

System: Powertrain  |  Type: Manufacturer-Specific  |  Make: Lexus

About P1346

P1346 is a manufacturer-specific powertrain diagnostic trouble code recorded for Lexus vehicles. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P1346 is stored, the module has detected a plausibility fault — the measured value is in the electrical range but is not consistent with expected operating behaviour; and a sensor-related fault — the reported value from the named sensor is out of spec.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

P1346 is a manufacturer-specific code. The same code string on a different make may have a different meaning. Always confirm the code's definition against the vehicle's service information for the specific make and model under test.

Code Information

On this Lexus the left side variable valve timing or camshaft position sensor reports cam timing to the Engine Control Module (ECM) so it can monitor and control variable valve timing. DTC P1346 sets when the sensor signal is present but out of the expected range or does not correlate correctly with the crankshaft position over operating conditions. Rather than a simple open or short, this code points to an implausible cam signal, often caused by a VVT actuator or timing problem, a damaged target, or a marginal sensor. When stored, the engine may idle rough, hesitate, lose power, or show VVT p...

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