AutoCodes – Generic – P1311

P1311 Code - ION Sensing Module SEC Line 1 Circuit Fault

Quick Answer

P1311 indicates ION Sensing Module SEC Line 1 Circuit Fault. Common causes include Faulty Ignition Coil, Ignition Coil harness is open or shorted, Ignition Coil circuit poor electrical connection. 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: P1311 indicates ION Sensing Module SEC Line 1 Circuit Fault.
Common causes: Common causes include Faulty Ignition Coil, Ignition Coil harness is open or shorted, Ignition Coil circuit poor electrical connection.
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.

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Code Popularity 15,162

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1311 Description

OBDII Code P1311 - ION Sensing Module SEC Line 1 Circuit Fault - AutoCodes.com — P1311 Code - ION Sensing Module SEC Line 1 Circuit Fault

What does this mean?

What are the Possible Causes of the DTC P1311?

Faulty Ignition Coil
Ignition Coil harness is open or shorted
Ignition Coil circuit poor electrical connection
Faulty ION Sensor Module

How to Fix the DTC P1311?

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 P1311 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 P1311 code?

Need more information on how to fix the P1311 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1311 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P1311 Hyundai — Ignition Control Module Circuit 1
P1311 Isuzu — ION Sensing Module SEC Line 1 Circuit Fault

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 P1311 Code

1. What are common symptoms of OBDII code P1311 (ION Sensing Module SEC Line 1 Circuit Fault)?

- Common symptoms include rough idling, engine misfires, loss of power, and illumination of the check engine light.

2. What causes the OBDII code P1311 to trigger?

- The code P1311 is triggered when there is a fault detected in the ION Sensing Module SEC Line 1 circuit, which may be caused by wiring issues, a faulty ION sensing module, or a problem with the ignition system.

3. How can I diagnose the source of the OBDII code P1311?

- To diagnose the issue, you can start by checking the wiring connections related to the ION Sensing Module SEC Line 1 circuit, testing the ION sensing module, and inspecting the ignition system components for any faults.

4. Can a DIYer repair the OBDII code P1311 issue at home?

- While some skilled DIYers may be able to address the issue themselves by checking and repairing wiring connections or replacing faulty components, it is recommended to consult a professional mechanic for a thorough diagnosis and repair.

5. What are the potential risks of ignoring the OBDII code P1311?

- Ignoring the OBDII code P1311 can lead to poor engine performance, decreased fuel efficiency, and potential damage to other engine components over time. It is advisable to address the issue promptly to prevent further complications.

6. Is it safe to drive with the OBDII code P1311 illuminated?

- It is generally not recommended to drive with the check engine light on due to the potential for underlying issues that may affect the vehicle's performance and safety. It is advisable to have the problem diagnosed and repaired as soon as possible.

7. How much does it typically cost to repair the OBDII code P1311?

- The cost of repairing the OBDII code P1311 can vary depending on the underlying cause of the issue, the extent of the repairs needed, and labor rates in your area. It is best to get a diagnostic assessment from a mechanic for an accurate estimate.

8. Can a faulty ION sensing module be repaired, or does it need to be replaced?

- In most cases, a faulty ION sensing module will need to be replaced rather than repaired. Replacing the module with a new, quality part is often the most effective solution to resolve the P1311 fault.

9. Are there any preventive measures to avoid the OBDII code P1311 from recurring?

- Regular maintenance of the ignition system, including checking and replacing spark plugs, ignition coils, and related components as needed, can help prevent issues that may trigger the OBDII code P1311.

10. How long does it typically take to repair the OBDII code P1311 issue?

- The repair time for the OBDII code P1311 can vary depending on the specific cause of the fault, the availability of parts, and the mechanic's workload. In general, the repair may take a few hours to complete.