What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

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Home » OBD2 Codes » P0195

Code P0195

Symptoms

• Check Engine Light is on

• Poor fuel economy

• Engine performance issues

Common Causes

• Faulty engine oil temperature sensor

• Damaged or corroded wiring or connectors

• Faulty ECM

Glossary

ECM: Engine Control Module

OBD-II: On-Board Diagnostics II

Related Codes

• P0196

• P0197

Official description

Engine Oil Temperature Sensor A Circuit

Laymans terms

This code means that the car's computer is having trouble reading the temperature of the engine oil. It's like a thermometer for the oil isn't working right.

Explanation

The engine oil temperature sensor measures the temperature of the engine oil and sends this information to the engine control module (ECM). If the ECM detects a problem with the sensor or its circuit, it sets the P0195 code.

Technical description

The P0195 code is triggered when the ECM detects a malfunction in the circuit of the engine oil temperature sensor. This could be due to a faulty sensor, wiring issues, or a problem with the ECM itself. The sensor provides vital information for engine performance and efficiency.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connectors for damage or corrosion.

• Test the engine oil temperature sensor for proper operation.

Repair procedures

• Replace the engine oil temperature sensor if faulty.

• Repair or replace damaged wiring or connectors.

• Reprogram or replace the ECM if necessary.

Tools required

• OBD-II scanner

• Multimeter

• Basic hand tools

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Ford F-150

• Chevrolet Silverado

• Toyota Camry

Preventive measures

• Regularly inspect and maintain wiring and connectors.

• Follow manufacturer-recommended oil change intervals.

• Use the correct type of engine oil.

Error code type

Sensor Issue

User experience recommendations

• Address the issue promptly to avoid engine damage.

• Consult a professional mechanic if unsure about repairs.

Warranty information

Check with the vehicle manufacturer for warranty coverage on sensors.

Historical data

P0195 has been a common code for vehicles using advanced engine management systems.

Urgency level

Moderate – While not immediately critical, it should be addressed to prevent long-term engine issues.

Legal and safety notice

Ignoring this code may lead to increased emissions and potential engine damage.

Testing conditions

• Engine at operating temperature

• Stable ambient conditions

Component location

The engine oil temperature sensor is typically located near the oil filter or oil pan.

FAQs

Q: Can I drive with a P0195 code?
A: It's possible to drive short distances, but it's best to fix the issue to avoid engine damage.

Q: How does the engine oil temperature sensor affect my car?
A: It helps the engine run efficiently by providing temperature data to the ECM.

Last updated: Mar 2, 2026 • Source: internal database

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