P0728 Mercedes-Benz Code - Engine Speed Input Circuit Intermittent
Quick Answer
The Engine Control Module (ECM) monitors the engine speed through the Crankshaft Position (CKP) sensor with the engine running, and send signal to the Transmission Control Module (TCM). Common causes include Faulty Crankshaft Position (CKP) Sensor, Crankshaft Position (CKP) Sensor harness is open or shorted, Crankshaft Position (CKP) 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
- P0728 Mercedes-Benz indicates Engine Speed Input Circuit Intermittent.
- Common causes
- Common causes include Faulty Crankshaft Position (CKP) Sensor, Crankshaft Position (CKP) Sensor harness is open or shorted, Crankshaft Position (CKP) 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 P0728 Mercedes-Benz Description
What are the Possible Causes of the DTC P0728 Mercedes-Benz?
- Faulty Crankshaft Position (CKP) Sensor
- Crankshaft Position (CKP) Sensor harness is open or shorted
- Crankshaft Position (CKP) Sensor circuit poor electrical connection
- Communication error between the Engine Control Module (ECM) and Transmission Control Module (TCM)
How to Fix the DTC P0728 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 P0728 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 P0728 Mercedes-Benz code?
Need more information on how to fix the P0728 Mercedes-Benz code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0728 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0728 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0728 in a Mercedes-Benz related to the Engine Speed Input Circuit Intermittent issue?
- Common symptoms include erratic or fluctuating engine RPM readings, hesitation or stalling while driving, and possible issues with shifting gears.
2. What are some possible causes of the Engine Speed Input Circuit Intermittent error code P0728 in a Mercedes-Benz?
- Potential causes include a faulty engine speed sensor, damaged wiring or connectors in the input circuit, or issues with the vehicle's ECM (Engine Control Module).
3. How can I diagnose the OBDII code P0728 in my Mercedes-Benz related to the Engine Speed Input Circuit Intermittent problem?
- Diagnosis typically involves using a diagnostic scanner to retrieve the code, testing the engine speed sensor for proper functioning, and inspecting the wiring and connectors for any damage.
4. Is it safe to continue driving my Mercedes-Benz with the P0728 error code present?
- It is not recommended to drive the vehicle with this error code as it can lead to potential drivability issues and further damage to the engine or transmission.
5. How can I repair the Engine Speed Input Circuit Intermittent issue causing the OBDII code P0728 in my Mercedes-Benz?
- Repair options may include replacing the faulty engine speed sensor, repairing or replacing damaged wiring or connectors, or reprogramming the ECM if needed.
6. Can a DIY enthusiast fix the P0728 code in a Mercedes-Benz, or is it best left to professionals?
- While some simple checks like inspecting wiring connections can be done by DIY enthusiasts, diagnosing and repairing the underlying issue causing the code is best left to professionals with proper tools and expertise.
7. Will resetting the error code P0728 in my Mercedes-Benz make the problem go away permanently?
- Simply resetting the error code may temporarily clear the warning light, but it will not fix the underlying issue causing the Engine Speed Input Circuit Intermittent problem.
8. Are there any preventive maintenance tips to avoid encountering the P0728 error code in a Mercedes-Benz?
- Regularly inspecting and maintaining the engine speed sensor, wiring harness, and connectors can help prevent issues that may trigger the P0728 code in the future.
9. How long does it typically take to repair the OBDII code P0728 related to the Engine Speed Input Circuit Intermittent issue in a Mercedes-Benz?
- The repair time can vary depending on the exact cause of the problem, but it may take a few hours to a full day for diagnosis and repair by a qualified technician.
10. Is the Engine Speed Input Circuit Intermittent issue causing the P0728 code common in certain Mercedes-Benz models or years?
- While this issue can occur in various Mercedes-Benz models, it may be more prevalent in specific vehicles known for sensor or wiring problems, especially in older models.
Discuss the causes and fixes for P0728 Mercedes-Benz OBDII Code
Code P0728 Mercedes-Benz comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
