Battery drain on Lexus
Low battery voltage can contribute to a MIL-on condition for P0335 (crankshaft position sensor circuit) and/or P0340 (camshaft position sensor circuit) due to inconsistent rotational speed of the engine’s crankshaft. This applies to all 1994 and later models (non-hybrid and hybrid).
Review the vehicle’s freeze frame data and verify if the battery voltage was below the minimum specification of 11 volts when the DTC was set. If battery voltage was below this minimum, determine the cause and repair accordingly.