P0385 Mercedes-Benz Code - Crankshaft Position Sensor 'B' Circuit
Quick Answer
The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. Common causes include Faulty crankshaft position sensor, Crankshaft position sensor harness is open or shorted, Crankshaft 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
- P0385 Mercedes-Benz indicates Crankshaft Position Sensor 'B' Circuit.
- Common causes
- Common causes include Faulty crankshaft position sensor, Crankshaft position sensor harness is open or shorted, Crankshaft 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 P0385 Mercedes-Benz Description
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.
What are the Possible Causes of the DTC P0385 Mercedes-Benz?
- Faulty crankshaft position sensor
- Crankshaft position sensor harness is open or shorted
- Crankshaft position sensor circuit poor electrical connection
- Signal plate may be damage
- Starter motor may be faulty
- Starting system circuit
- Dead or weak battery
How to Fix the DTC P0385 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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0385 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 P0385 Mercedes-Benz code?
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Frequently Asked Questions about P0385 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0385 in a Mercedes-Benz related to the Crankshaft Position Sensor 'B' Circuit?
The common symptoms include engine misfires, rough idling, difficulty starting the vehicle, and stalling while driving.
2. What are the possible causes of OBDII code P0385 in a Mercedes-Benz?
The code P0385 can be triggered by a faulty crankshaft position sensor, damaged sensor wiring, or a poor connection between the sensor and the ECM.
3. How can I diagnose the issue causing OBDII code P0385 in my Mercedes-Benz?
You can diagnose the issue by using an OBDII scanner to read the code, visually inspecting the crankshaft position sensor and its wiring, and testing the sensor's electrical resistance.
4. Can I continue driving my Mercedes-Benz with OBDII code P0385 present?
It is not recommended to drive the vehicle with code P0385 present as it can lead to poor engine performance and potential stalling, which may compromise your safety.
5. How can I repair OBDII code P0385 in my Mercedes-Benz?
To repair the issue, you may need to replace the faulty crankshaft position sensor, repair or replace damaged wiring, or ensure a proper connection between the sensor and the ECM.
6. Are there any tips to prevent OBDII code P0385 from occurring in my Mercedes-Benz?
Regularly inspecting and maintaining the crankshaft position sensor and its wiring can help prevent issues that trigger code P0385 in your Mercedes-Benz.
7. How much does it cost to fix OBDII code P0385 in a Mercedes-Benz?
The cost of fixing code P0385 can vary depending on the root cause of the issue, but it typically ranges from $150 to $300 for parts and labor.
8. Can a DIY enthusiast repair OBDII code P0385 in a Mercedes-Benz?
If you have the necessary tools and experience working on automotive electrical systems, you may be able to replace the crankshaft position sensor yourself. However, professional diagnosis is recommended.
9. Will resetting the OBDII system clear code P0385 in my Mercedes-Benz?
Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code P0385 is not addressed, the code is likely to reappear.
10. Is it safe to ignore OBDII code P0385 in my Mercedes-Benz?
Ignoring code P0385 can lead to more severe engine issues over time, potentially resulting in costly repairs. It is best to address the problem promptly to avoid further damage.
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