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Engine-Codes – Generic – P0298

P0298 Code - Engine Oil Over Temperature Condition

Quick Answer

The P0298 code indicates an engine oil over-temperature condition, which means that the engine oil temperature has exceeded the normal operating range. Common causes include Insufficient oil level or low-quality oil, Faulty oil temperature sensor, Clogged oil filter restricting oil flow. 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
P0298 indicates Engine Oil Over Temperature Condition.
Common causes
Common causes include Insufficient oil level or low-quality oil, Faulty oil temperature sensor, Clogged oil filter restricting oil flow.
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.
What is this?
Table of contents Created and updated by William Orellana on Aug 18, 2024
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Code P0298 Description

The P0298 code indicates an engine oil over-temperature condition, which means that the engine oil temperature has exceeded the normal operating range. This can lead to various issues such as reduced engine performance, increased wear and tear on engine components, and potential damage to the engine if left unresolved. Engine oil plays a crucial role in lubricating and cooling the engine components, and if it overheats, it can lose its lubricating properties, leading to increased friction and heat generation within the engine.

OBDII Code P0298 - Engine Oil Over Temperature Condition
P0298 Code - Engine Oil Over Temperature Condition

Common Causes of P0298

  1. Insufficient oil level or low-quality oil
  2. Faulty oil temperature sensor
  3. Clogged oil filter restricting oil flow
  4. Coolant system malfunction leading to inadequate engine cooling
  5. Engine operating under heavy load or high RPM for extended periods

Symptoms of P0298

  1. Engine running hotter than usual
  2. Reduced engine power or acceleration
  3. Engine overheating warning light illuminated on the dashboard
  4. Increased engine noise or knocking sounds
  5. Smoke or burning smell coming from the engine compartment

How to Fix P0298

  1. Check and top up engine oil to the correct level with high-quality oil
  2. Inspect and replace the oil temperature sensor if faulty
  3. Replace the oil filter to ensure proper oil flow
  4. Check and repair any issues with the coolant system
  5. Avoid operating the engine under heavy load or high RPM for prolonged periods

Cost to Fix P0298

The cost of repairing an engine oil over-temperature condition can vary depending on the specific cause of the issue. On average, you can expect to pay between $100 to $500 for parts and labor. However, it's important to note that diagnostic time and labor rates at auto repair shops can vary, so it's recommended to obtain a quote from a trusted mechanic in your area.

What does this mean?

Tech Notes for P0298

On engines which are equipped with an oil temperature sensor, the Engine Control Module (ECM) reads oil temperature to determine if it is excessive. When an oil temperature sensor is not present, the ECM uses an oil algorithm to infer actual temperature. Engine shutdown strategy function is the same on vehicles with and without oil temperature sensors.

When is the Code Detected?

P0298 is set when the vehicle has been running below 1,000 rpm and less than 20 mg/stroke MFDES with EOT sensor signal reading above 110 C (230 F). The time to set the fault is dependent on EOT and Intake Air Temperature (IAT) temperatures, and can vary between approx. 15 to 45 minutes

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Code P0298 Information for Specific Makes

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.

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