P0370 Code - Timing Reference High Resolution Signal 'A' Malfunction
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
- P0370 indicates Timing Reference High Resolution Signal 'A' Malfunction.
- 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 P0370 Description
What are the Possible Causes of the DTC P0370?
- 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 P0370?
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 P0370 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 P0370 code?
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Need Help with the Code?
Get the P0370 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P0370 BMW — Timing Reference High Resolution Signal 'A' Malfunction
- P0370 Buick — Timing Reference High Resolution System Performance
- P0370 Cadillac — Timing Reference High Resolution System Performance
- P0370 Chevrolet — Timing Reference High Resolution System Performance
- P0370 GMC — Timing Reference High Resolution System Performance
- P0370 Mercedes-Benz — Timing Reference High Resolution Signal 'A' Malfunction
- P0370 MINI — Timing Reference High Resolution Signal 'A' Malfunction
Frequently Asked Questions about P0370 Code
No Frequently Asked Questions about P0370 Code found.
Discuss the causes and fixes for P0370 OBDII Code
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2001 Dodge Ram 3500 with Cummins Turbo Diesel
Another symptom:the engine will occasionally miss
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