The P1320 trouble code is a manufacturer-specific diagnostic trouble code (DTC) primarily associated with Nissan vehicles. It signifies an “Ignition Signal Primary – circuit malfunction.” This code is triggered when the Powertrain Control Module (PCM) detects a failure in the primary ignition circuit, which can lead to issues such as engine misfires or starting difficulties. Understanding and addressing this code is crucial for maintaining optimal engine performance.
| P1320 Code Meaning | P1320 Code Common Causes |
|---|---|
| Ignition Signal Primary – circuit malfunction | Faulty ignition coil |
| Loss of ignition signal to the PCM | Open or shorted wiring in the ignition circuit |
| Power transistor failure in the ignition coil | Faulty crankshaft position sensor |
| Defective ignition system components | Poor electrical connections in the ignition circuit |
| Intermittent electrical resistance issues | Faulty ECM (Engine Control Module) |
Symptoms of P1320 Code
When the P1320 code is present, you may notice several symptoms that indicate an underlying issue with the ignition system:
- Check Engine Light: The most common indication is the illumination of the check engine light on your dashboard.
- Engine Misfires: You may experience engine misfires, particularly during acceleration or under load.
- Difficulty Starting: The vehicle might have trouble starting, especially after it has been running for a while.
- Rough Idle: The engine may run roughly at idle, causing vibrations or unusual noises.
- Decreased Performance: You may notice a drop in overall engine performance, including reduced power and acceleration.
Technical Explanation of P1320 Code
The P1320 code indicates a malfunction in the primary ignition signal circuit. In a properly functioning ignition system, the PCM receives signals from the crankshaft and camshaft position sensors to determine when to fire each cylinder. This process involves several components:
- Crankshaft Position Sensor (CKP): This sensor detects the position of the crankshaft and sends its signal to the PCM.
- Power Transistor: The PCM uses this component to control the ignition coil’s primary circuit, turning it on and off to induce high voltage in the secondary circuit.
- Ignition Coil: This component converts low voltage from the battery into high voltage needed to create a spark at the spark plugs.
If any part of this system fails—whether it’s due to faulty wiring, a bad ignition coil, or a malfunctioning CKP sensor—the PCM will trigger the P1320 code.
Step-by-Step Diagnosis of P1320 Code
Diagnosing a P1320 code requires a systematic approach to identify and rectify the underlying issue. Here’s how to proceed:
Step 1: Scan for Codes
Use an OBD-II scanner to confirm that P1320 is present. Note any additional codes that may be stored, as they can provide insight into related issues.
Step 2: Visual Inspection
- Check all wiring connected to the ignition system for signs of damage, corrosion, or loose connections.
- Inspect the ignition coils for physical damage or signs of wear.
Step 3: Test Crankshaft Position Sensor
- Use a multimeter to test the CKP sensor’s resistance and output voltage.
- Compare your readings with manufacturer specifications; replace if out of range.
Step 4: Check Ignition Coil
- Measure the resistance of each ignition coil using a multimeter.
- Ensure that each coil meets manufacturer specifications; replace any faulty coils.
Step 5: Inspect Power Transistor
- Test the power transistor within each ignition coil for proper operation.
- If defective, replace the entire ignition coil assembly.
Step 6: Check Wiring and Connectors
- Use a wiring diagram to trace and test all connections in the primary ignition circuit.
- Repair any damaged wires or connectors as necessary.
Step 7: Clear Codes and Test Drive
Once repairs are made, clear any stored codes using your OBD-II scanner and take your vehicle for a test drive to ensure that the issue has been resolved.
Solution Methods for P1320 Code
Addressing a P1320 code involves several potential solutions based on what you find during diagnosis:
- Replace Faulty Ignition Coils: If testing reveals that one or more coils are defective, replacing them with OEM parts is recommended for reliability.
- Repair Wiring Issues: If you discover damaged wiring or poor connections, repair or replace these components as needed.
- Replace Crankshaft Position Sensor: If this sensor is found faulty, replacing it can often resolve the issue.
- Check PCM Functionality: In rare cases where all other components are functional but issues persist, consider testing or replacing the PCM itself.
Cost Estimates for Repairs
The cost of repairs related to a P1320 code can vary significantly based on labor rates and parts pricing. Here’s an overview:
- Ignition Coil Replacement: $100 – $300 per coil (labor included).
- Crankshaft Position Sensor Replacement: $150 – $250 (parts and labor).
- Wiring Repairs: $50 – $150 depending on complexity.
- PCM Replacement: $500 – $1,500 depending on make and model.
Warnings and Recommendations
When dealing with a P1320 code, keep these important points in mind:
- Always address any secondary trouble codes first; they can provide critical information about underlying issues affecting your vehicle’s performance.
- Use OEM parts whenever possible to ensure compatibility and reliability; aftermarket parts can sometimes lead to recurring issues.
- If you’re not comfortable diagnosing or repairing electrical systems, seek professional assistance. Ignition system repairs can be complex and require specialized knowledge and tools.
Closing Paragraph
The P1320 trouble code signifies an important issue within your vehicle’s ignition system that should not be ignored. By following proper diagnostic procedures and addressing any identified problems promptly, you can restore your vehicle’s performance and reliability. Whether you’re a DIY mechanic or seeking professional help, understanding this code will empower you to make informed decisions about your vehicle’s maintenance needs.
Frequently Asked Questions About P1320
- What does P1320 mean?
The P1320 code indicates an “Ignition Signal Primary – circuit malfunction,” typically related to issues in Nissan vehicles’ ignition systems. - Can I drive my car with a P1320 code?
While it may still run, driving with this code can lead to misfires and reduced performance; it’s advisable to address it promptly. - What are common symptoms of a P1320 code?
Common symptoms include check engine light illumination, engine misfires, difficulty starting, rough idling, and decreased performance. - How do I fix a P1320 code?
Fixing this code involves diagnosing components like ignition coils, wiring issues, crankshaft position sensors, and potentially replacing faulty parts. - Is it safe to drive with a P1320 code?
It’s generally not safe; while you might be able to drive short distances, unresolved issues could lead to more significant problems. - How much does it cost to repair a P1320 code?
The cost varies widely but can range from $100 for simple fixes up to $1,500 for more complex repairs like PCM replacement. - Can aftermarket parts cause a P1320 code?
Yes, aftermarket parts may not meet OEM specifications and could trigger this code even if they appear functional. - When should I seek professional help for a P1320?
If you’re unable to diagnose or repair electrical issues confidently, it’s best to consult with an automotive professional.