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AutoCodes - Generic - P0340

P0340 Code - Camshaft Position Sensor 'A' Circuit Malfunction

- Code Popularity: 461,293 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
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By AutoCodes.com - Updated Aug 14, 2020
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|Code P0340 Possible Causes

  • Faulty Camshaft Position Sensor
  • Camshaft Position Sensor harness is open or shorted
  • Camshaft Position Sensor circuit poor electrical connection
  • Faulty starter motor
  • Starting system circuit
  • Dead (Weak) battery

|How do I Fix the Code P0340?

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's pins.

Does your Car have Safety Recalls? → Check here

|Code P0340 Tech Notes

Sometimes and in some models, low battery voltage or a weak starter can trigger a Camshaft Position Sensor code.









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|What is the Cost to Diagnose the Code P0340?

Labor: 1.0

The cost of diagnosing the P0340 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|When is the Code P0340 Detected?

The camshaft position sensor signal is not detected by the Engine Control Module(ECM) during the first few seconds of engine cranking

|What are Code P0340 Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Lack/Loss of Power
  • Engine Stall

|Code P0340 Description

The Camshaft Position Sensor is an electronic device used in an engine to record the rate at which the camshaft is spinning. This information is used by the Engine Control Module(ECM) to control ignition and fuel injection. The camshaft position sensor senses the retraction of camshaft (intake) to identify a particular cylinder. The camshaft position sensor senses the piston position. The sensor system consists of a rotating part, typically a disc, as well as a static part, the actual sensor.
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
When the crankshaft position sensor (POS) system becomes inoperative, the camshaft position sensor provides various controls of engine parts instead, utilizing timing of cylinder identification signals.

*Sensor design may vary for your model and year

OBDII Code P0340 - Camshaft Position Sensor 'A' Circuit Malfunction - AutoCodes.com
P0340 Code - Camshaft Position Sensor 'A' Circuit Malfunction

|Need More Information on the P0340 Code?

Need more information on how to fix the P0340 code? Get Access to Factory Service Manuals

|Information for Specific Makes

|Need Help with the P0340 Code?

Get the P0340 code diagnosed by a professional: Find a repair shop in your area

|Code P0340 comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0340 code? Have you replaced any parts?
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