The P1337 trouble code is a diagnostic trouble code (DTC) that indicates a problem with the Crankshaft Position Sensor 2 or the Crankshaft Speed Fluctuation (CKF) sensor circuit. This code is crucial for the proper functioning of the engine, as it directly affects ignition timing and fuel injection. When the Engine Control Module (ECM) detects that the crankshaft position sensor is not sending a signal, it triggers the P1337 code, which can lead to various performance issues such as engine stalling, misfires, and loss of power.
| P1337 Code Meaning | P1337 Code Common Causes |
|---|---|
| Crankshaft Position Sensor 2 No Signal | Faulty crankshaft position sensor |
| Crankshaft Speed Fluctuation Sensor Issue | Damaged wiring or poor connections |
| ECM Failure | Faulty reluctor ring on crankshaft |
| Signal Interruption in Circuit | Corrosion or debris in sensor connectors |
| Incorrect Timing Information Sent to ECM | Electrical shorts or opens in wiring harness |
Symptoms of P1337 Code
When the P1337 code is triggered, vehicle owners may experience several symptoms:
- Check Engine Light: The most common symptom is the illumination of the check engine light on the dashboard.
- Engine Stalling: The engine may stall unexpectedly due to incorrect timing information being sent to the ECM.
- Loss of Power: Drivers may notice a significant loss of power while accelerating or during normal driving conditions.
- Rough Idling: The engine may idle roughly or inconsistently, indicating potential misfires.
Technical Explanations
The crankshaft position sensor plays a vital role in monitoring the position and rotational speed of the crankshaft. This information is essential for the ECM to control ignition timing and fuel injection accurately. When there is no signal from the crankshaft position sensor, it can disrupt these functions, leading to performance issues.
The P1337 code specifically indicates that the ECM is not receiving a signal from Crankshaft Position Sensor 2. This could be due to several factors, including:
- A faulty sensor that has failed electrically.
- Damaged wiring or connectors that interrupt the signal transmission.
- Issues with the reluctor ring on the crankshaft, which can affect how the sensor reads positions.
Step-by-Step Diagnosis
To diagnose a P1337 code effectively, follow these steps:
- Initial Scan: Use an OBD-II scanner to confirm the presence of DTC P1337 and check for any additional codes that may be related.
- Visual Inspection: Inspect the crankshaft position sensor and its wiring for any visible damage, corrosion, or disconnections.
- Check Sensor Connection: Ensure that the sensor connector is securely attached and free of debris or corrosion.
- Test Sensor Resistance: Use a multimeter to measure the resistance of Crankshaft Position Sensor 2. Compare readings to manufacturer specifications.
- Check Signal Output: Use an oscilloscope to verify signal output from Crankshaft Position Sensor 2 while cranking the engine; look for a consistent waveform.
- Inspect Reluctor Ring: Examine the reluctor ring on the crankshaft for any damage or misalignment that could interfere with sensor signals.
- Check Power Supply: Verify that the sensor receives correct voltage supply from the ECM using a multimeter.
- ECU Check: If all previous steps are satisfactory, inspect the ECM for any faults affecting signal processing.
- Replace Sensor: If found faulty, replace Crankshaft Position Sensor 2 and clear DTC codes. Re-test to ensure resolution.
Solution Methods
Repairing a P1337 code typically involves one or more of these methods:
- Sensor Replacement: If diagnostics indicate that Crankshaft Position Sensor 2 is faulty, replacing it is often necessary. Sensors can range in price but typically cost between $50 and $150 depending on make and model.
- Wiring Repair: If damaged wiring or connectors are found during inspection, repairing or replacing them will restore proper function.
- Reluctor Ring Replacement: If issues are detected with the reluctor ring, replacing it may be required to ensure accurate readings from the crankshaft position sensor.
- ECM Reprogramming/Replacement: In rare cases where all other components are functioning correctly but issues persist, reprogramming or replacing the ECM may be necessary.
Cost Estimates
The costs associated with resolving a P1337 code can vary significantly based on parts and labor:
- Diagnostic Fees: Expect to pay between $75 and $150 for professional diagnostic services if you choose not to perform diagnostics yourself.
- Parts Costs:
- Crankshaft Position Sensor: $50 – $150
- Wiring Harness Repair Parts: $20 – $100
- Reluctor Ring Replacement: $30 – $100
- Labor Costs: Labor rates can range from $75 to $150 per hour depending on your region and whether you go to a dealership or an independent shop.
Overall, total repair costs for resolving a P1337 code can range from $150 to over $500 depending on what repairs are needed.
Warnings and Recommendations
- Always consult your vehicle’s service manual for specific diagnostic procedures related to your make and model before beginning repairs.
- If you are not comfortable performing these diagnostics or repairs yourself, seek professional assistance immediately.
- Ignoring a P1337 code can lead to severe engine performance issues and potential long-term damage if not addressed promptly.
Closing Paragraph
The P1337 trouble code indicates critical issues related to your vehicle’s crankshaft position sensor system. Understanding its implications and following appropriate diagnostic steps can help you resolve this issue efficiently. Whether you’re a DIY mechanic or seeking professional help, addressing this code promptly will ensure your vehicle operates smoothly and reliably.
Frequently Asked Questions About P1337
- What does error code P1337 mean?
P1337 indicates that there is no signal from Crankshaft Position Sensor 2, affecting ignition timing and fuel injection. - Can I drive my car with a P1337 code?
While it may be possible to drive short distances, it’s not recommended as it can lead to engine stalling and further damage. - How much does it cost to fix a P1337 code?
The repair costs can range from $150 to over $500 depending on parts needed and labor charges. - Is it safe to replace the crankshaft position sensor myself?
If you have mechanical experience and proper tools, you can replace it yourself; otherwise, seek professional help. - What are common symptoms of a failing crankshaft position sensor?
Common symptoms include check engine light illumination, engine stalling, loss of power, and rough idling. - Can other codes accompany P1337?
Yes, it’s common for multiple codes related to engine performance issues to appear alongside P1337. - What should I do if I clear the code but it comes back?
If clearing does not resolve it permanently, further diagnosis is needed as underlying issues may still exist. - Are there any recalls related to P1337?
Check with your vehicle manufacturer for any recalls associated with crankshaft position sensors specific to your model.