Engine-CodesMercury – P1299 Mercury

P1299 Mercury Code - Cylinder Head Temperature Sensor Detected Engine Overheating Condition

Quick Answer

The P1299 code for Mercury vehicles indicates that the Cylinder Head Temperature Sensor has detected an engine overheating condition. Common causes include Malfunctioning cylinder head temperature sensor, Faulty thermostat, Cooling system leak. 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
P1299 Mercury indicates Cylinder Head Temperature Sensor Detected Engine Overheating Condition.
Common causes
Common causes include Malfunctioning cylinder head temperature sensor, Faulty thermostat, Cooling system leak.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1299 Mercury Description

The P1299 code for Mercury vehicles indicates that the Cylinder Head Temperature Sensor has detected an engine overheating condition. This sensor is responsible for monitoring the temperature of the cylinder head, which is crucial for maintaining optimal engine performance and preventing damage due to overheating. When this sensor detects that the engine temperature is exceeding safe levels, it triggers the P1299 code to alert the driver or technician of the issue.

OBDII Code P1299 Mercury - Cylinder Head Temperature Sensor Detected Engine Overheating Condition
P1299 Mercury Code - Cylinder Head Temperature Sensor Detected Engine Overheating Condition

Common Causes of P1299 Mercury

  1. Malfunctioning cylinder head temperature sensor
  2. Faulty thermostat
  3. Cooling system leak
  4. Clogged radiator
  5. Water pump failure

Symptoms of P1299 Mercury

  1. Engine overheating warning light on the dashboard
  2. Engine running hot or overheating
  3. Loss of engine power
  4. Decreased fuel efficiency
  5. Rough idling or stalling

How to Fix P1299 Mercury

  1. Check the cooling system for leaks and repair any damaged components.
  2. Inspect the cylinder head temperature sensor and replace if faulty.
  3. Test the thermostat and replace if it is not functioning properly.
  4. Flush and refill the cooling system with fresh coolant.
  5. Ensure proper operation of the water pump and replace if necessary.

Cost to Fix P1299 Mercury

The typical repair costs for addressing the P1299 code on a Mercury vehicle can range from $200 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that the actual cost can vary significantly based on factors such as the location of the repair shop, the make and model of the vehicle, and the type of engine. Additionally, diagnosis time and labor rates can also impact the overall cost, with rates typically ranging from $80 to $150 per hour. To obtain a more accurate estimate, it is recommended to consult with a local auto repair shop.

Tech Notes for P1299 Mercury









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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 P1299 Mercury Code

No Frequently Asked Questions about P1299 Mercury Code found.

Discuss the causes and fixes for P1299 Mercury OBDII Code

  • Went to Auto zone....Engine light on.They detected a couple codes.... P1299, P0130, P1299, P0130. Auto zone looked at Transmission fluid. Found out that it was empty...Put in 5 gallons of transmission fluid. Than found out there is an leak underneath vehicle.

  • What model and year is your vehicle? Low transmission fluid should not trigger the codes you listed P1299 and P0130.

    P0130 MERCURY - O2 Sensor Circuit Malfunction Bank 1 Sensor 1
    Read more: https://www.autocodes.com/p...

  • 08' Mercury Sable

  • The Engine Cooling Fan is the most likely cause of the P1299 code and the Oxygen sensor for the P0130 code, but neither of the codes are related to the transmission.