P0373 Code - Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses
Quick Answer
The P0373 diagnostic trouble code (DTC) indicates that there is an intermittent or erratic signal detected from the timing reference high-resolution signal 'A'. Common causes include Faulty crankshaft position sensor, Wiring issues or poor connections in the timing reference signal circuit, Malfunctioning ECM. 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 indicates Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses.
- Common causes
- Common causes include Faulty crankshaft position sensor, Wiring issues or poor connections in the timing reference signal circuit, Malfunctioning ECM.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0373 Description
The P0373 diagnostic trouble code (DTC) indicates that there is an intermittent or erratic signal detected from the timing reference high-resolution signal 'A'. This signal is crucial for the engine control module (ECM) to accurately determine the precise timing of the engine's operation. The timing reference signal is used by the ECM to synchronize fuel injection, ignition timing, and other critical engine functions. When this signal becomes intermittent or erratic, it can lead to misfires, poor engine performance, and potentially engine stalling.
Common Causes of P0373
- Faulty crankshaft position sensor
- Wiring issues or poor connections in the timing reference signal circuit
- Malfunctioning ECM
- Engine mechanical problems affecting the timing system
- Incorrect timing belt or chain alignment
Symptoms of P0373
- Engine misfires
- Rough idling or hesitation during acceleration
- Decreased fuel efficiency
- Engine stalling
- Illuminated check engine light
How to Fix P0373
- Diagnose the issue by using a scan tool to monitor the timing reference signal 'A' while the engine is running.
- Inspect the crankshaft position sensor and its wiring for any damage or corrosion. Replace if necessary.
- Check the wiring harness and connectors for any signs of damage or poor connections. Repair or replace as needed.
- Verify proper alignment of the timing belt or chain and adjust if necessary.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0373
The cost of repairing a P0373 code can vary depending on the specific cause of the issue. Generally, the cost of replacing a crankshaft position sensor can range from $50 to $200, while addressing wiring issues may cost between $100 to $300. If the ECM needs to be replaced, it can cost anywhere from $200 to $600. The total repair cost, including parts and labor, could range from $150 to $800. It's important to note that labor rates and part prices can vary, so it's recommended to consult with a professional mechanic for a more accurate estimate based on your vehicle's make and model.
When is the Code Detected?
Need more information about the P0373 code?
Need more information on how to fix the P0373 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0373 code diagnosed by a professional: Find a repair shop in your area
Code P0373 Information for Specific Makes
- P0373 BMW — Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses
- P0373 Mercedes-Benz — Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses
- P0373 MINI — Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses
- P0373 Volkswagen — Timing Reference High Resolution Signal 'A' Intermittent/Erratic Pulses
Frequently Asked Questions about P0373 Code
1. What are common symptoms of OBDII code P0373?
Symptoms may include engine misfires, rough idling, decreased fuel efficiency, and difficulties starting the vehicle.
2. What causes the OBDII code P0373 to trigger?
The code is usually triggered by intermittent or erratic signals from the high-resolution timing reference sensor 'A', which can be caused by sensor malfunctions, wiring issues, or engine timing problems.
3. How can I diagnose the issue related to OBDII code P0373?
Diagnosis typically involves checking the wiring and connections of the timing reference sensor 'A', testing the sensor itself, and ensuring proper engine timing.
4. Can a faulty crankshaft position sensor trigger code P0373?
Yes, a faulty crankshaft position sensor can sometimes cause intermittent or erratic signals that trigger OBDII code P0373.
5. Is it safe to continue driving with OBDII code P0373 active?
It is not recommended to drive with this code active, as it can lead to potential engine performance issues and further damage if left unresolved.
6. How can I repair OBDII code P0373?
Repair options include replacing the high-resolution timing reference sensor 'A', repairing or replacing damaged wiring, ensuring proper engine timing, and clearing the error code.
7. Can a DIY enthusiast fix OBDII code P0373 at home?
Depending on the level of expertise, DIY enthusiasts may be able to diagnose and repair the issue causing OBDII code P0373, such as replacing the sensor or fixing wiring problems.
8. Will resetting the error code make OBDII code P0373 go away permanently?
Resetting the error code without addressing the underlying issue will not make OBDII code P0373 go away permanently. The root cause of the problem must be identified and fixed.
9. How important is it to address OBDII code P0373 promptly?
It is crucial to address the code promptly to prevent potential engine performance issues, reduced fuel efficiency, and further damage to the vehicle.
10. Can extreme weather conditions affect the occurrence of OBDII code P0373?
Extreme weather conditions, particularly temperature fluctuations, can sometimes affect the occurrence of erratic or intermittent signals that trigger OBDII code P0373.
Discuss the causes and fixes for P0373 OBDII Code
Code P0373 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.