P1126 Infiniti Code - Thermostat Function
Quick Answer
The P1126 code in an Infiniti vehicle indicates a problem with the thermostat function. Common causes include Faulty thermostat, Coolant leaks, Air pockets in the cooling system. 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 Infiniti indicates Thermostat Function.
- Common causes
- Common causes include Faulty thermostat, Coolant leaks, Air pockets in the cooling system.
- 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 P1126 Infiniti Description
The P1126 code in an Infiniti vehicle indicates a problem with the thermostat function. The thermostat is a crucial component of the engine cooling system, regulating the flow of coolant to maintain the engine operating temperature within the optimal range. When this code appears, it means that there is an issue with the thermostat that could lead to overheating or inefficient engine performance. If left untreated, this can cause significant damage to the engine and other components.
Common Causes of P1126 Infiniti
- Faulty thermostat
- Coolant leaks
- Air pockets in the cooling system
- Electrical issues with the thermostat sensor
- Clogged radiator
Symptoms of P1126 Infiniti
- Engine overheating
- Fluctuating engine temperature gauge
- Poor fuel economy
- Engine running too cold
- Check Engine Light illuminated
How to Fix P1126 Infiniti
- Diagnose the issue by checking the thermostat and related components for any visible damage or malfunction.
- Test the thermostat to see if it opens and closes properly at the correct temperature.
- Replace the thermostat if it is found to be faulty or not functioning correctly.
- Check and refill the coolant system, ensuring there are no leaks or air pockets.
- Clear the trouble codes and test drive the vehicle to confirm the repair.
Cost to Fix P1126 Infiniti
The cost of repairing a thermostat issue in an Infiniti vehicle can vary depending on the specific model and year. Generally, the parts for a thermostat replacement can range from $50 to $200, while the labor costs can be around $100 to $300. Overall, the total repair cost for resolving a P1126 code related to thermostat function in an Infiniti can be in the range of $150 to $500. Please note that these are rough estimates, and actual costs may differ based on various factors. It is recommended to get quotes from local auto repair shops for a more accurate cost assessment.
Tech Notes for P1126 Infiniti
For Infiniti vehicles other than the 2000-2001 models see: P1126 Infiniti
When is the Code Detected?
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Information for Specific Infiniti Models
- P1126 2000 Infiniti G20 — Thermostat Function
- P1126 2001 Infiniti G20 — Thermostat Function
- P1126 2002 Infiniti G20 — Thermostat Function
- P1126 2003 Infiniti G35 — Throttle Control Motor Relay Circuit Open
- P1126 2004 Infiniti G35 — Throttle Control Motor Relay Circuit Open
- P1126 2005 Infiniti G35 — Throttle Control Motor Relay Circuit Open
- P1126 2000 Infiniti I30 — Thermostat Function
- P1126 2001 Infiniti I30 — Thermostat Function
Frequently Asked Questions about P1126 Infiniti Code
1. What does the OBDII code P1126 mean for an Infiniti?
P1126 indicates a Thermostat Function issue, meaning the engine control module (ECM) has detected a problem with the operation of the thermostat.
2. What are the common symptoms of a P1126 code?
Symptoms may include engine overheating or running cooler than expected, poor fuel efficiency, and the check engine light being illuminated.
3. What causes the P1126 code to appear?
Common causes include a stuck-closed or stuck-open thermostat, low coolant levels, a malfunctioning coolant temperature sensor, or wiring/electrical issues.
4. Can I keep driving with a P1126 code?
It is not recommended to drive with this code for an extended period, as improper thermostat function can lead to engine overheating or inefficient performance.
5. How is the P1126 code diagnosed?
A mechanic will typically check the thermostat for proper operation, inspect the coolant level, look for leaks, and test the coolant temperature sensor and related wiring.
6. How do I fix the P1126 code on my Infiniti?
Repairs may include replacing the thermostat, refilling or flushing the coolant, repairing wiring or connectors, or replacing the coolant temperature sensor.
7. How much does it cost to fix a P1126 code?
The cost to repair a P1126 code varies but typically ranges between $150 and $300 for thermostat replacement, depending on labor rates and parts pricing.
8. Can a low coolant level trigger the P1126 code?
Yes, a low coolant level can cause improper thermostat function, which may result in the P1126 code being triggered.
9. Will clearing the P1126 code fix the problem?
Clearing the code may turn off the check engine light temporarily, but the underlying issue must be addressed to prevent the code from returning.
10. How can I prevent a P1126 code in the future?
Regularly check and maintain proper coolant levels, ensure the cooling system is flushed on schedule, and replace the thermostat as needed to prevent issues.
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