AutoCodes – Volkswagen – P0373 Volkswagen

P0373 Volkswagen 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 Volkswagen 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.

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Code Popularity 336

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Oct 13, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0373 Volkswagen Description

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. The high resolution is one of the most important inputs by the PCM for fuel control and timing. This test monitors the number of high resolution pulses which have been missed (not detected). It's based on a comparison between the number of pulses that were detected since the last pump cam pulse and the number of the pulses that should have occurred. There are approximately 64 high resolution pulses for every cam pulse.

OBDII Code P0373 Volkswagen - Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses - AutoCodes.com — P0373 Volkswagen Code - Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses

What does this mean?

What are the Possible Causes of the DTC P0373 Volkswagen?

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 Volkswagen?

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 Volkswagen 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0373 Volkswagen Code

1. What are common symptoms of OBDII code P0373 in a Volkswagen?

- Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and potential stalling while driving.

2. What are possible causes of the Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses code in a Volkswagen?

- Possible causes may include a faulty crankshaft position sensor, damaged wiring or connectors, issues with the engine control module (ECM), or timing chain/belt problems.

3. How can I diagnose the cause of OBDII code P0373 in my Volkswagen?

- Diagnosis typically involves using a scan tool to read the code, checking the wiring and connectors related to the crankshaft position sensor, and testing the sensor itself for proper functioning.

4. Can I continue driving my Volkswagen with OBDII code P0373 present?

- It is not recommended to continue driving with this code present, as it can lead to more serious issues like engine damage or complete failure if not addressed promptly.

5. How can I repair OBDII code P0373 in my Volkswagen?

- Repair may involve replacing the crankshaft position sensor, repairing damaged wiring or connectors, resetting the ECM, or addressing any timing chain/belt issues as needed.

6. Are there any DIY tips for fixing OBDII code P0373 in a Volkswagen?

- DIY tips include checking for loose or damaged wiring, ensuring proper sensor connections, and consulting your vehicle's manual for specific troubleshooting steps.

7. What should I do if OBDII code P0373 keeps coming back in my Volkswagen after repair?

- If the code keeps returning, it is recommended to have a professional mechanic perform a thorough inspection to identify any underlying issues that may be causing the recurrence.

8. Is it safe to clear the OBDII code P0373 in my Volkswagen without addressing the underlying problem?

- Clearing the code without fixing the underlying issue may temporarily turn off the check engine light, but the problem will likely persist and could lead to more severe consequences over time.

9. How long does it typically take to repair OBDII code P0373 in a Volkswagen?

- The repair time can vary depending on the exact cause of the code and the complexity of the repair needed, but it can range from a few hours to a full day in some cases.

10. Can OBDII code P0373 in a Volkswagen affect the vehicle's overall performance?

- Yes, this code can impact the vehicle's performance by causing issues with ignition timing, fuel delivery, and overall engine operation, leading to reduced efficiency and potential drivability problems.