Sometimes and in some models, low battery voltage or a weak starter can trigger a Camshaft Position Sensor code.
Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P0340 1998 Toyota Corolla code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The camshaft position sensor signal is not detected by the Engine Control Module(ECM) during the first few seconds of engine cranking
The Camshaft Position Sensor (G Signal) consist of a signal plate and pickup coil.
The G signal plate had one tooth on its outer circumference and is built into the distributor. When the camshaft rotate, the protrusion on the signal plate and the air gap on the pickup coil change, causing fluctuations in the magnetic field and generating an electromotive force in the pickup coil.
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