AutoCodes – Generic – P102B

P102B Code - Exhaust Temperature Sensor

Quick Answer

The Engine Control Module (ECM) monitors the Exhaust Temperature Sensor. Common causes include Faulty Exhaust Temperature Sensor, Exhaust Temperature Sensor harness is open or shorted, Exhaust Temperature Sensor circuit poor electrical connection. 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: P102B indicates Exhaust Temperature Sensor.
Common causes: Common causes include Faulty Exhaust Temperature Sensor, Exhaust Temperature Sensor harness is open or shorted, Exhaust Temperature Sensor circuit poor electrical connection.
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 10,686

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P102B Description

The Engine Control Module (ECM) monitors the Exhaust Temperature Sensor. The ECM sets the OBDII code when the Exhaust Temperature Sensor is not to factory specifications.

OBDII Code P102B - Exhaust Temperature Sensor - AutoCodes.com — P102B Code - Exhaust Temperature Sensor

What does this mean?

What are the Possible Causes of the DTC P102B?

Faulty Exhaust Temperature Sensor
Exhaust Temperature Sensor harness is open or shorted
Exhaust Temperature Sensor circuit poor electrical connection

How to Fix the DTC P102B?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P102B 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.

Need more information about the P102B code?

Need more information on how to fix the P102B code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P102B code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P102B Nissan — Exhaust Temperature Sensor

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 P102B Code

1. What are common symptoms of an OBDII code P102B related to the Exhaust Temperature Sensor?

- Common symptoms include poor engine performance, reduced fuel efficiency, and potential illumination of the check engine light.

2. What are the possible causes of an OBDII code P102B related to the Exhaust Temperature Sensor?

- Causes can include a faulty exhaust temperature sensor, wiring issues, sensor calibration problems, or a malfunctioning PCM (Powertrain Control Module).

3. How can I diagnose the source of an OBDII code P102B related to the Exhaust Temperature Sensor?

- Diagnosis involves using a scan tool to read the code, testing the sensor for proper functionality, inspecting the wiring for damage, and checking the PCM for any faults.

4. Can I continue driving my vehicle with an OBDII code P102B related to the Exhaust Temperature Sensor?

- It is not recommended to ignore this code, as it can lead to further engine damage and may result in decreased performance and fuel efficiency.

5. How can I repair an OBDII code P102B related to the Exhaust Temperature Sensor?

- Repair options include replacing the faulty exhaust temperature sensor, repairing any damaged wiring, calibrating the sensor, or resetting the PCM.

6. Is it possible to reset the OBDII code P102B related to the Exhaust Temperature Sensor without fixing the underlying issue?

- Clearing the code without addressing the root cause will likely result in the code reappearing once the issue persists.

7. Can a DIY enthusiast fix an OBDII code P102B related to the Exhaust Temperature Sensor?

- Depending on the level of experience and access to tools, some DIY enthusiasts may be able to diagnose and replace the sensor or repair wiring issues themselves.

8. Are there any preventive maintenance steps to avoid encountering an OBDII code P102B related to the Exhaust Temperature Sensor?

- Regularly inspecting the exhaust system, ensuring proper sensor calibration, and addressing any engine performance issues promptly can help prevent this code from appearing.

9. How long does it typically take to repair an OBDII code P102B related to the Exhaust Temperature Sensor?

- The repair time can vary depending on the exact cause of the code, but it may take anywhere from 1 to 3 hours at a mechanic's shop.

10. Are there any recalls or technical service bulletins related to an OBDII code P102B and the Exhaust Temperature Sensor?

- It is advisable to check with your vehicle manufacturer or authorized service center to inquire about any existing recalls or technical service bulletins related to this specific OBDII code and sensor.