P0340 Chevrolet Code - Camshaft Position Sensor Circuit
Quick Answer
The Camshaft Position Sensor detects magnetic flux changes between the four narrow and wide tooth slots on the reluctor wheel. Common causes include Faulty Camshaft Position Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0340 Chevrolet indicates Camshaft Position Sensor Circuit.
- Common causes
- Common causes include Faulty Camshaft Position Sensor, Camshaft Position Sensor harness is open or shorted, Camshaft Position Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P0340 Chevrolet Description
The ECM also has a dedicated replicated Camshaft Position Sensor signal output circuit that may be used as an input signal to other modules for monitoring engine RPM.
The Diagnostic Trouble Code (DTC) will be set when the ECM does not receive a signal from the Camshaft Position Sensor during 200 engine revolutions.
What are the Possible Causes of the DTC P0340 Chevrolet?
- 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 to Fix the DTC P0340 Chevrolet?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0340 Chevrolet code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Chevrolet Models
- P0340 2014 Chevrolet Silverado — Camshaft Position Sensor Circuit
- P0340 2015 Chevrolet Silverado — Camshaft Position Sensor Circuit
- P0340 2016 Chevrolet Silverado — Camshaft Position Sensor Circuit
- P0340 2017 Chevrolet Silverado — Camshaft Position Sensor Circuit
- P0340 2018 Chevrolet Silverado — Camshaft Position Sensor Circuit
- P0340 2003 Chevrolet Trailblazer — Camshaft Position Sensor 'A' Circuit Malfunction
Frequently Asked Questions about P0340 Chevrolet Code
1. What are the common symptoms of OBDII code P0340 in a Chevrolet related to the Camshaft Position Sensor Circuit?
- Common symptoms include rough idling, engine stalling, poor acceleration, and difficulty starting the vehicle.
2. What are the possible causes of OBDII code P0340 in a Chevrolet?
- The code P0340 in a Chevrolet is often caused by a faulty camshaft position sensor, wiring issues, or a problem with the sensor's connector.
3. How can I diagnose the OBDII code P0340 in my Chevrolet related to the Camshaft Position Sensor Circuit?
- Diagnosing code P0340 involves checking the camshaft position sensor's wiring, connector, and sensor itself for any signs of damage or malfunction.
4. Can a bad camshaft position sensor cause OBDII code P0340 in a Chevrolet?
- Yes, a malfunctioning or faulty camshaft position sensor is a common cause of OBDII code P0340 in a Chevrolet.
5. What are some repair tips for fixing OBDII code P0340 in a Chevrolet?
- Repair tips include checking and replacing the camshaft position sensor, inspecting and repairing any damaged wiring, and ensuring the sensor's connector is securely attached.
6. Is it safe to continue driving my Chevrolet with OBDII code P0340 related to the Camshaft Position Sensor Circuit?
- It is not recommended to drive the vehicle with code P0340 as it can lead to further engine performance issues and potential breakdowns.
7. How much does it typically cost to repair OBDII code P0340 in a Chevrolet?
- The cost of repairing OBDII code P0340 in a Chevrolet can vary depending on the extent of the issue, but it typically ranges from $100 to $300 for parts and labor.
8. Can I reset OBDII code P0340 in my Chevrolet without fixing the underlying issue?
- While you can clear the code using a diagnostic scanner, it will likely reappear until the underlying problem with the camshaft position sensor circuit is resolved.
9. Are there any preventive measures to avoid OBDII code P0340 in a Chevrolet?
- Regularly inspecting and maintaining the camshaft position sensor, wiring, and connector can help prevent issues that lead to code P0340 in a Chevrolet.
10. How long does it take to fix OBDII code P0340 in a Chevrolet at a repair shop?
- Repairing OBDII code P0340 related to the Camshaft Position Sensor Circuit in a Chevrolet typically takes 1-2 hours, depending on the exact cause and extent of the issue.
Discuss the causes and fixes for P0340 Chevrolet OBDII Code
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I have a 2011 Chevy Silverado 1500
I have a code reader and I am getting the code p0340.
The truck has stalled a couple of times and it does have less power.
What does it take to fix it. -
I just wanted to thank you for your diagram. every other one I've found online showed the sensor at the back of the engine next to the oil pressure sensor. I was able to reach down and plug in a plug that was just hanging there for some reason?!
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I've replaced the camshaft position sensor, but the code p0340 still pops up. What else could it be?
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Hello Justin, let me check for more information. What model and year is your vehicle?
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80% of the times the problem is the Camshaft Position Sensor, but according to a a national database of repairs, sometimes the problem could be the Ignition Coil. Specially when the vehicle is between 100K-150K miles.
Before replacing the Ignition Coil, make sure the Camshaft Position Sensor was properly installed and the connector is firmly connected.
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