P1336 Code: Step-by-Step Repair

The P1336 trouble code is a diagnostic trouble code (DTC) related to the Crankshaft Position Sensor (CKP). This code indicates that the Engine Control Module (ECM) has detected a malfunction within the CKP system, specifically that the system variation has not been learned or is outside acceptable limits. The crankshaft position sensor plays a critical role in monitoring the crankshaft’s rotational speed and position, which are essential for proper engine timing and fuel injection. When this sensor fails or provides incorrect data, it can lead to significant engine performance issues, including misfires, stalling, and difficulty starting.

Symptoms of P1336 Code

When the P1336 code is triggered, vehicle owners may experience several symptoms:

• Check Engine Light: The most common indication is the illumination of the check engine light on the dashboard.
• Engine Misfires: Incorrect timing information can lead to engine misfires, resulting in rough idling and poor acceleration.
• Difficulty Starting: The vehicle may struggle to start due to inaccurate data being sent to the ECM.
• Stalling: Intermittent stalling may occur if the crankshaft position sensor fails while driving.
• Reduced Fuel Efficiency: Poor fuel injection timing can lead to increased fuel consumption.

Technical Explanations

The P1336 code relates primarily to the Crankshaft Position Sensor’s ability to provide accurate rotational speed and position data to the ECM. This sensor typically uses a reluctor wheel with teeth that pass by a stationary sensor. As these teeth move past the sensor, they create a changing magnetic field that generates a voltage signal. If there are issues such as chipping on the reluctor wheel or problems with the wiring, this signal can become erratic or lost altogether.

Step-by-Step Diagnosis

1. Initial Scan: Use an OBD-II scanner to confirm the presence of DTC P1336 and check for any additional codes that may be related.
2. Visual Inspection: Inspect the crankshaft position sensor and its wiring for any visible damage, corrosion, or loose connections.
3. Sensor Testing: Use a multimeter to test the crankshaft position sensor’s resistance and compare it to the manufacturer’s specifications.
4. Wiring Continuity Check: Perform a continuity test on the wiring harness between the crankshaft position sensor and the ECM to ensure there are no breaks or shorts.
5. ECM Inspection: Check the ECM for any signs of damage or malfunction that could affect the crankshaft position sensor’s signal.
6. Road Test: Conduct a road test after repairs to ensure that the issue has been resolved and that no new codes appear.

Solution Methods

Replacing the Crankshaft Position Sensor

If diagnostics indicate that the crankshaft position sensor is faulty:

1. Disconnect the battery to ensure safety.
2. Locate and remove the old crankshaft position sensor.
3. Install a new sensor, ensuring it is properly aligned with any reluctor wheel.
4. Reconnect all wiring and battery terminals.
5. Clear any codes using an OBD-II scanner and perform a road test.

Repairing Wiring Issues

If damaged wiring or connectors are found:

1. Repair or replace any frayed wires or corroded connectors.
2. Ensure all connections are secure and free from moisture.
3. Test continuity again after repairs are made.

Performing a Crankshaft Position System Variation Learn Procedure

After replacing components or if PCM was replaced:

1. Start with engine at normal operating temperature.
2. Follow specific instructions for your vehicle model to perform a CASE relearn using an appropriate scan tool.
3. Monitor for any additional DTCs during this process.

Cost Estimates

• Crankshaft Position Sensor Replacement: $75 – $150 (parts only)
• Labor Costs: $100 – $200 depending on shop rates
• Wiring Repairs: Costs can vary widely based on extent of damage but typically range from $50 – $150

Warnings and Recommendations

• Always disconnect your vehicle’s battery before working on electrical components to avoid short circuits or shocks.
• If you are not comfortable performing these repairs yourself, it is highly recommended to seek professional assistance as improper handling can lead to further damage.
• Ignoring a P1336 code can lead to severe engine damage over time due to misfires and poor performance.

Closing Paragraph

The P1336 trouble code indicates critical issues with your vehicle’s crankshaft position sensing system that should not be ignored. Understanding its symptoms, causes, and solutions can empower vehicle owners and DIY mechanics alike to address these problems effectively. Regular maintenance checks and prompt attention to warning signs will help ensure your vehicle operates smoothly and efficiently.

Frequently Asked Questions About P1336

• What does P1336 mean?
  The P1336 code indicates that there is an issue with learning or detecting variations in signals from the crankshaft position sensor.
• Can I drive my car with a P1336 code?
  It is not advisable as it may lead to engine misfires, stalling, or other serious performance issues.
• How do I fix a P1336 code?
  The primary fixes include replacing a faulty crankshaft position sensor, repairing damaged wiring, or performing a relearn procedure for your vehicle’s PCM.
• What are common symptoms of P1336?
  Common symptoms include check engine light illumination, engine misfires, difficulty starting, stalling, and reduced fuel efficiency.
• Is P1336 serious?
  Yes, it is considered critical as it can affect engine timing and performance.
• How much does it cost to repair P1336?
  The cost can range from $75 for parts alone up to several hundred dollars when including labor for diagnostics and repairs.
• Will clearing the code fix my problem?
  No, clearing the code will not fix underlying issues; proper diagnosis and repair are necessary.
• Can I reset my own check engine light?
  You can reset it using an OBD-II scanner; however, if underlying issues remain unresolved, it will likely return.