P0371 Mercedes-Benz Code - Timing Reference High Resolution Signal 'A' Too Many Pulses
Quick Answer
The optical sensor provides a high resolution signal to the Powertrain Control Module (PCM) by counting pulses on the sensor disk located in the injection pump. Common causes include Timing Reference Optical Sensor harness is open or shorted, Timing Reference Optical Sensor circuit poor electrical connection, Faulty Timing Reference Optical Sensor. 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
- P0371 Mercedes-Benz indicates Timing Reference High Resolution Signal 'A' Too Many Pulses.
- Common causes
- Common causes include Timing Reference Optical Sensor harness is open or shorted, Timing Reference Optical Sensor circuit poor electrical connection, Faulty Timing Reference Optical Sensor.
- 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 P0371 Mercedes-Benz Description
What are the Possible Causes of the DTC P0371 Mercedes-Benz?
- Timing Reference Optical Sensor harness is open or shorted
- Timing Reference Optical Sensor circuit poor electrical connection
- Faulty Timing Reference Optical Sensor
- Damaged Powertrain Control Module (PCM)
How to Fix the DTC P0371 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 P0371 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 P0371 Mercedes-Benz code?
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Frequently Asked Questions about P0371 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0371 in a Mercedes-Benz?
- Common symptoms include rough idling, engine misfires, poor acceleration, and potential stalling.
2. What does the OBDII code P0371 'Timing Reference High Resolution Signal 'A' Too Many Pulses' mean for a Mercedes-Benz?
- This code indicates that the Engine Control Module (ECM) has detected too many pulses in the high-resolution signal from the camshaft position sensor 'A.'
3. What are the possible causes of OBDII code P0371 in a Mercedes-Benz?
- Possible causes include a faulty camshaft position sensor 'A,' damaged wiring or connectors, incorrect timing belt installation, or a malfunctioning ECM.
4. How can I diagnose OBDII code P0371 in my Mercedes-Benz?
- Diagnosis involves using a scan tool to retrieve the code, checking the camshaft position sensor 'A' and its wiring for damage, and verifying the timing belt alignment.
5. Is it safe to drive my Mercedes-Benz with OBDII code P0371 active?
- It is not recommended to drive your vehicle with this code active, as it can lead to engine performance issues and potential damage if left unresolved.
6. Can I repair OBDII code P0371 in my Mercedes-Benz myself?
- Depending on your skill level, you may be able to replace the camshaft position sensor 'A' or repair damaged wiring yourself. However, complex timing belt adjustments may require professional assistance.
7. Will resetting the fault codes make OBDII code P0371 go away in my Mercedes-Benz?
- Resetting the fault codes may temporarily clear the code, but if the underlying issue causing P0371 is not addressed, the code is likely to reappear upon driving.
8. How much does it typically cost to repair OBDII code P0371 in a Mercedes-Benz?
- The cost of repair can vary based on the exact cause of the code and whether professional labor is required. Replacement of the camshaft position sensor 'A' can range from $100 to $300.
9. Can a faulty camshaft position sensor 'A' cause other issues besides triggering OBDII code P0371 in a Mercedes-Benz?
- Yes, a faulty camshaft position sensor 'A' can also cause poor fuel efficiency, difficulty starting the engine, and potential loss of power while driving.
10. How often should I have my Mercedes-Benz inspected to prevent OBDII code P0371 from occurring?
- It's recommended to follow the manufacturer's recommended maintenance schedule, including regular inspections of sensors and components related to engine timing, to help prevent issues like OBDII code P0371.
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