P0373 Mercedes-Benz Code - Timing Reference High Resolution Signal 'A' Intermittent/Erratic 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
- P0373 Mercedes-Benz indicates Timing Reference High Resolution Signal 'A' Intermittent/Erratic 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 P0373 Mercedes-Benz Description
What are the Possible Causes of the DTC P0373 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 P0373 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 P0373 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 P0373 Mercedes-Benz Code
1. What are the common symptoms of OBDII code P0373 in a Mercedes-Benz related to Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses?
- Common symptoms include rough engine performance, misfires, stalling, and difficulty starting the vehicle.
2. What can cause the OBDII code P0373 to trigger in a Mercedes-Benz?
- The code P0373 is triggered when there are intermittent or erratic pulses detected in the high-resolution signal 'A', often caused by a faulty crankshaft position sensor, wiring issues, or a malfunctioning engine control module.
3. How can I diagnose the OBDII code P0373 in my Mercedes-Benz?
- Diagnosing the code P0373 involves performing a thorough inspection of the crankshaft position sensor, checking the wiring for any damage or loose connections, and using a diagnostic scanner to monitor the signal from the sensor.
4. Can driving with the OBDII code P0373 in a Mercedes-Benz cause further damage to the vehicle?
- Continuing to drive with the code P0373 present can potentially lead to more severe engine issues, such as permanent damage to engine components or complete engine failure.
5. What are some repair tips for addressing the OBDII code P0373 in a Mercedes-Benz?
- Repair tips include replacing the faulty crankshaft position sensor, repairing any damaged wiring, and resetting the engine control module to clear the code.
6. Is it safe to reset the OBDII code P0373 in a Mercedes-Benz without addressing the underlying issue?
- It is not recommended to simply reset the code without addressing the root cause, as the issue will likely reoccur and could lead to more significant problems with the vehicle.
7. How much does it typically cost to repair the OBDII code P0373 in a Mercedes-Benz?
- The cost of repairing the code P0373 can vary depending on the exact cause of the issue, but it may range from $200 to $500 for parts and labor.
8. Can a DIY enthusiast with basic mechanical skills fix the OBDII code P0373 in a Mercedes-Benz?
- While some DIY enthusiasts may be able to replace the crankshaft position sensor themselves, diagnosing and repairing the code P0373 may require specialized tools and expertise, so it is often best left to professional mechanics.
9. How urgent is it to address the OBDII code P0373 in a Mercedes-Benz?
- It is important to address the code P0373 promptly to prevent further damage to the engine and ensure the vehicle operates safely and efficiently.
10. Are there any recalls or technical service bulletins related to the OBDII code P0373 in Mercedes-Benz vehicles?
- It is recommended to check with a Mercedes-Benz dealership or the manufacturer's website for any recalls or technical service bulletins related to the code P0373 to see if there are any known issues or solutions provided by the manufacturer.
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