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P0337 Cadillac Code - Crankshaft Position Sensor Circuit Low Duty Cycle

Quick Answer

The P0337 diagnostic trouble code (DTC) for Cadillac vehicles indicates that the crankshaft position sensor circuit is experiencing a low duty cycle. Common causes include Faulty crankshaft position sensor, Damaged or corroded wiring in the sensor circuit, Loose or poor electrical connections. 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
P0337 Cadillac indicates Crankshaft Position Sensor Circuit Low Duty Cycle.
Common causes
Common causes include Faulty crankshaft position sensor, Damaged or corroded wiring in the sensor circuit, Loose or poor electrical connections.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 30, 2024
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Code P0337 Cadillac Description

The P0337 diagnostic trouble code (DTC) for Cadillac vehicles indicates that the crankshaft position sensor circuit is experiencing a low duty cycle. The crankshaft position sensor is a crucial component that monitors the position and speed of the crankshaft, providing essential data to the engine control module (ECM) for ignition timing and fuel injection. A low duty cycle means that the sensor is not sending consistent or accurate signals to the ECM, which can lead to various performance issues.

OBDII Code P0337 Cadillac - Crankshaft Position Sensor Circuit Low Duty Cycle
P0337 Cadillac Code - Crankshaft Position Sensor Circuit Low Duty Cycle

Common Causes of P0337 Cadillac

  1. Faulty crankshaft position sensor
  2. Damaged or corroded wiring in the sensor circuit
  3. Loose or poor electrical connections
  4. ECM software issues
  5. Engine mechanical problems affecting the sensor's performance

Symptoms of P0337 Cadillac

  1. Engine misfires or rough idling
  2. Difficulty starting the vehicle
  3. Reduced fuel efficiency
  4. Stalling or hesitation during acceleration
  5. Illumination of the check engine light

How to Fix P0337 Cadillac

  1. Diagnose the issue by using a scan tool to read the DTC and inspect the crankshaft position sensor and its circuit.
  2. Test the crankshaft position sensor's output signal using a multimeter to determine if it is functioning correctly.
  3. Replace the crankshaft position sensor if it is faulty, ensuring proper installation and secure connections.
  4. Check and repair any damaged or corroded wiring in the sensor circuit.
  5. Clear the DTC codes and test drive the vehicle to verify that the issue has been resolved.

Cost to Fix P0337 Cadillac

The cost of repairing a crankshaft position sensor circuit with a low duty cycle can vary depending on the specific components that need to be replaced or repaired. On average, the parts for this repair can range from $50 to $150, while labor costs can be around $100 to $200. Overall, the total cost for addressing this issue may fall between $150 and $350. However, it's essential to consider that actual repair costs can differ based on factors such as location, vehicle model, and labor rates at auto repair shops. It's recommended to consult with a professional mechanic for an accurate estimate.

When is the Code Detected?

The crankshaft position sensor (POS) signal is not detected by the Powertrain Control Module (PCM) during the first few seconds of engine cranking

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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 P0337 Cadillac Code

1. What are the common symptoms of OBDII code P0337 in a Cadillac related to the crankshaft position sensor circuit low duty cycle?

The common symptoms include engine misfires, rough idling, stalling, decreased fuel efficiency, and difficulty starting the vehicle.

2. What are the possible causes of OBDII code P0337 in a Cadillac indicating a low duty cycle in the crankshaft position sensor circuit?

The code P0337 in a Cadillac can be caused by a faulty crankshaft position sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

3. How can I diagnose the OBDII code P0337 in a Cadillac related to the crankshaft position sensor circuit low duty cycle?

Diagnosing the issue involves using a scan tool to read the code, testing the crankshaft position sensor for proper operation, inspecting the wiring and connectors for damage, and checking the ECM for any faults.

4. Can I still drive my Cadillac with OBDII code P0337 indicating a low duty cycle in the crankshaft position sensor circuit?

It is not recommended to drive the vehicle with code P0337 present, as it can lead to more severe engine problems and potential breakdowns. It is advisable to address the issue promptly.

5. How can I repair OBDII code P0337 in a Cadillac related to the crankshaft position sensor circuit low duty cycle?

Repairing the issue involves replacing the faulty crankshaft position sensor, repairing or replacing damaged wiring or connectors, and clearing the code from the ECM using a scan tool.

6. Are there any DIY tips for fixing OBDII code P0337 in a Cadillac myself?

While some experienced DIYers may attempt to replace the crankshaft position sensor themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair to ensure the issue is resolved correctly.

7. How much does it typically cost to fix OBDII code P0337 in a Cadillac due to a low duty cycle in the crankshaft position sensor circuit?

The cost of repair can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor, excluding diagnostic fees.

8. Can a faulty crankshaft position sensor cause other OBDII codes to appear in a Cadillac besides P0337?

Yes, a faulty crankshaft position sensor can cause other related codes to appear, such as P0335 (Crankshaft Position Sensor "A" Circuit) or P0338 (Crankshaft Position Sensor "A" Circuit High Input).

9. Will resetting the OBDII code P0337 in a Cadillac make the issue go away permanently?

Simply resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed and repaired, the code is likely to reappear.

10. How urgent is it to address OBDII code P0337 in a Cadillac indicating a low duty cycle in the crankshaft position sensor circuit?

It is recommended to address the issue promptly to prevent potential engine damage and ensure the vehicle operates safely and efficiently.

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