Mechanics

CODE P1350

2002 Lexus ES 300

2002 Lexus ES 300 6 cyl Two Wheel Drive Automatic 82000 miles

2002 lexus ES300, code p1350 retrieved, says manufacture ignition control or misfire. I tried to reset code but comes right back in a few seconds and car is in very low rpm and stalls or engine died out. If step on gas pedal then it is ok but still died out if let off pedal. It seem to become better if drive car for some miles around the block but trying not to let engine died out. Problem persist with very low rpm with check engine liight stays ON. Can any one pin point this problem for me? Thank you! (Monitoring live data from running engine says misfire is OK) could it be the problem form a faulty spark plug?
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Cml5456
August 6, 2008.



DTC P1350: VARIABLE VALVE TIMING (VVT) CIRCUIT MALFUNCTION

NOTE: Variable Valve Timing (VVT) sensor is also known as camshaft position sensor.

Circuit Description

The Variable Valve Timing (VVT) sensor consists of a signal plate and pick-up coil. The signal plates have 3 teeth and are mounted on each intake camshaft. The VVT sensor provides feedback to ECM in order to control intake valve timing. DTC P1350 is set if no VVT sensor (crank position sensor No. 1) signal to ECM during cranking at 4 seconds or more, no VVT sensor (crank position sensor No. 1) signal to ECM with 5 second or more and engine speed at 600 RPM or more, or while crankshaft rotates twice, VVT sensor (crank position sensor No. 1) signal is input to ECM 5 times. Possible causes are:  Open or short in VVT sensor circuit.
 Faulty VVT sensor.
 Camshaft timing gear.
 ECM.
Diagnostic Aids
Using scan tool, read freeze frame data. Freeze frame records engine conditions when malfunction is detected.

Diagnosis & Repair
1. Disconnect suspect VVT sensor connector. Measure resistance between VVT sensor terminals. Resistance should be 835-1400 ohms at 14-122 °F (-10-50 °C), or 1060-1645 ohms at 122-212 °F (50-100 °C). Replace VVT sensor as necessary. If resistance is as specified, go to next step. 2. Check for open or short circuit in wiring harness between ECM connector and appropriate VVT sensor. See WIRING DIAGRAMS article. Repair as necessary. If wiring harness is okay, inspect VVT sensor installation. Tighten sensor as necessary. If VVT sensor is installed properly, replace ECM and retest.

8/6/2008

BMRFIXIT
Aug 6, 2008.