P1385 Mercedes-Benz Code - Knock Sensor Circuit Bank 2
Quick Answer
P1385 Mercedes-Benz indicates Knock Sensor Circuit Bank 2. Common causes include Faulty Knock Sensor, Knock Sensor harness is open or shorted, Knock 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
- P1385 Mercedes-Benz indicates Knock Sensor Circuit Bank 2.
- Common causes
- Common causes include Faulty Knock Sensor, Knock Sensor harness is open or shorted, Knock 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 P1385 Mercedes-Benz Description
What are the Possible Causes of the DTC P1385 Mercedes-Benz?
- Faulty Knock Sensor
- Knock Sensor harness is open or shorted
- Knock Sensor circuit poor electrical connection
How to Fix the DTC P1385 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 P1385 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.
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Frequently Asked Questions about P1385 Mercedes-Benz Code
What does the OBDII code P1385 mean for a Mercedes-Benz?
P1385 indicates a problem with the Knock Sensor Circuit on Bank 2, which monitors engine vibrations to detect knocking or pre-ignition.
What are the common symptoms of code P1385 on a Mercedes-Benz?
Symptoms may include reduced engine performance, poor fuel efficiency, engine knocking sounds, and the Check Engine Light turning on.
What causes the P1385 code to appear on a Mercedes-Benz?
Common causes include a faulty knock sensor, damaged wiring or connectors, poor electrical connections, or an issue with the engine control module (ECM).
Can driving with code P1385 damage my Mercedes-Benz engine?
Yes, ignoring this code can lead to severe engine damage over time, as the knock sensor helps prevent harmful detonation or knocking.
How can I diagnose the P1385 code in my Mercedes-Benz?
Use an OBDII scanner to confirm the code, then inspect the knock sensor, wiring, and connectors for damage or corrosion. A multimeter can also be used to test sensor functionality.
Where is the knock sensor located on a Mercedes-Benz?
The knock sensor for Bank 2 is typically mounted on the engine block or cylinder head, on the side corresponding to Bank 2.
How do I fix code P1385 on my Mercedes-Benz?
Repairs may include replacing the faulty knock sensor, repairing or replacing damaged wiring, or ensuring secure electrical connections.
How much does it cost to fix the P1385 code on a Mercedes-Benz?
The cost varies based on the issue, but replacing a knock sensor typically costs between $150 and $400, including parts and labor.
Can I reset the P1385 code without fixing the issue?
You can reset the code using an OBDII scanner, but the issue will likely return unless the underlying problem is resolved.
What happens if the knock sensor fails completely?
If the knock sensor fails, the ECM cannot detect engine knocking, which can lead to increased wear, overheating, or catastrophic engine damage.
Discuss the causes and fixes for P1385 Mercedes-Benz OBDII Code
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