AutoCodes – Infiniti – P1126 2002 Infiniti G20

P1126 2002 Infiniti G20 Code - Thermostat Function

Quick Answer

Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long enough. Common causes include Low engine coolant level, Faulty Thermostat, Leakage from sealing portion of thermostat. 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: P1126 2002 Infiniti G20 indicates Thermostat Function.
Common causes: Common causes include Low engine coolant level, Faulty Thermostat, Leakage from sealing portion of thermostat.
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 12,467

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 26, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1126 2002 Infiniti G20 Description

Engine coolant temperature has not risen enough to open the thermostat even though the engine has run long enough. This is due to a leak in the seal or the thermostat open stuck.

OBDII Code P1126 2002 Infiniti G20 - Thermostat Function - AutoCodes.com — P1126 2002 Infiniti G20 Code - Thermostat Function

What does this mean?

What are the Possible Causes of the DTC P1126 2002 Infiniti G20?

Low engine coolant level
Faulty Thermostat
Leakage from sealing portion of thermostat
Engine coolant temperature sensor

How to Fix the DTC P1126 2002 Infiniti G20?

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 does this mean?

Code Tech Notes

If no coolant leaks are present, replacing the thermostat usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1126 2002 Infiniti G20 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.

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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 P1126 2002 Infiniti G20 Code

1. What are the common symptoms of OBDII code P1126 in a 2002 Infiniti G20 related to thermostat function?

- Common symptoms include overheating engine, erratic temperature gauge readings, and poor heater performance.

2. What are the potential causes of OBDII code P1126 in a 2002 Infiniti G20?

- The code P1126 in a 2002 Infiniti G20 is usually related to a faulty thermostat, a malfunctioning coolant temperature sensor, or a problem with the cooling system.

3. How does a faulty thermostat contribute to triggering OBDII code P1126 in a 2002 Infiniti G20?

- A faulty thermostat can get stuck in the closed position, preventing the proper flow of coolant through the engine, leading to overheating and triggering code P1126.

4. Can a DIY enthusiast repair OBDII code P1126 in a 2002 Infiniti G20 related to thermostat function?

- Yes, replacing a faulty thermostat is a relatively straightforward repair that can be done by a DIY enthusiast with basic automotive knowledge and tools.

5. What are some essential repair tips for addressing OBDII code P1126 in a 2002 Infiniti G20 related to thermostat function?

- Before replacing the thermostat, ensure the cooling system is properly bled of air to prevent overheating issues post-repair. Also, consider replacing the coolant if it's old or contaminated.

6. Is it safe to continue driving a 2002 Infiniti G20 with OBDII code P1126 related to thermostat function?

- It is not recommended to drive the vehicle with a faulty thermostat, as it can lead to severe engine damage due to overheating. It's best to address the issue promptly.

7. How can a professional mechanic diagnose OBDII code P1126 in a 2002 Infiniti G20 related to thermostat function?

- A mechanic may use a scan tool to read the code, perform a visual inspection of the cooling system components, test the thermostat for proper operation, and check the coolant temperature sensor.

8. Are there any preventive measures to avoid encountering OBDII code P1126 in a 2002 Infiniti G20 related to thermostat function?

- Regularly scheduled maintenance, such as coolant system flushes and inspections, can help prevent thermostat-related issues that could trigger code P1126.

9. Will resetting the OBDII system clear code P1126 in a 2002 Infiniti G20 related to thermostat function?

- Resetting the OBDII system may temporarily clear the code, but if the underlying issue, such as a faulty thermostat, is not addressed, the code is likely to reappear.

10. How much does it typically cost to repair OBDII code P1126 in a 2002 Infiniti G20 related to thermostat function at a repair shop?

- The cost of repairing OBDII code P1126 related to thermostat function in a 2002 Infiniti G20 can vary depending on the exact issue, but it typically ranges from $150 to $400, including parts and labor.