AutoCodes – Mercedes-Benz – P1340 Mercedes-Benz

P1340 Mercedes-Benz Code - Camshaft Position Sensor Signal

Quick Answer

P1340 Mercedes-Benz indicates Camshaft Position Sensor Signal. Common causes include Faulty Camshaft Position Sensor (CMP), Camshaft Position Sensor (CMP) harness is open or shorted, Camshaft Position Sensor (CMP) 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: P1340 Mercedes-Benz indicates Camshaft Position Sensor Signal.
Common causes: Common causes include Faulty Camshaft Position Sensor (CMP), Camshaft Position Sensor (CMP) harness is open or shorted, Camshaft Position Sensor (CMP) 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.

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Code Popularity 4,133

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

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Table of contents Created and updated by William Orellana on Aug 11, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1340 Mercedes-Benz Description

OBDII Code P1340 Mercedes-Benz - Camshaft Position Sensor Signal - AutoCodes.com — P1340 Mercedes-Benz Code - Camshaft Position Sensor Signal

What does this mean?

What are the Possible Causes of the DTC P1340 Mercedes-Benz?

Faulty Camshaft Position Sensor (CMP)
Camshaft Position Sensor (CMP) harness is open or shorted
Camshaft Position Sensor (CMP) circuit poor electrical connection

How to Fix the DTC P1340 Mercedes-Benz?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1340 Mercedes-Benz 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.

Need more information about the P1340 Mercedes-Benz code?

Need more information on how to fix the P1340 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1340 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P1340 Mercedes-Benz Code

1. What does the OBDII code P1340 mean on a Mercedes-Benz?

P1340 indicates a problem with the camshaft position sensor signal, suggesting an issue with the sensor's ability to communicate accurate timing data to the engine control module (ECM).

2. What are the common symptoms of the P1340 code on a Mercedes-Benz?

Symptoms may include rough idling, engine misfires, reduced engine performance, difficulty starting the engine, and the check engine light illuminating.

3. What causes the P1340 code on a Mercedes-Benz?

Common causes include a faulty camshaft position sensor, damaged or frayed wiring, poor electrical connections, a misaligned timing chain, or a malfunctioning ECM.

4. Can I continue driving my Mercedes-Benz with the P1340 code?

Driving with this code is not recommended as it may lead to engine misfires, reduced performance, and potential damage to other engine components over time.

5. How do I diagnose the P1340 code on a Mercedes-Benz?

Start by scanning the vehicle with an OBDII scanner, inspecting the camshaft position sensor and its wiring for damage, and checking the timing chain alignment. Advanced diagnostics may require a multimeter or oscilloscope.

6. How do I fix the P1340 code on my Mercedes-Benz?

Repairs may include replacing the camshaft position sensor, repairing damaged wiring or connectors, resetting the timing chain, or reprogramming/updating the ECM if necessary.

7. How much does it cost to repair the P1340 code on a Mercedes-Benz?

Repair costs can vary, but replacing the camshaft position sensor typically ranges from $150 to $400, depending on labor rates and parts pricing.

8. Can a dirty or clogged camshaft affect the P1340 code?

Yes, a clogged or dirty camshaft can cause inaccurate readings from the camshaft position sensor, potentially triggering the P1340 code.

9. Will clearing the P1340 code with a scanner fix the issue?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.

10. Is the P1340 code specific to Mercedes-Benz vehicles?

While P1340 commonly refers to a camshaft position sensor signal issue in Mercedes-Benz vehicles, the exact meaning of the code can vary by manufacturer. Always consult a model-specific repair manual.