AutoCodes – Dodge – P2742 Dodge

P2742 Dodge Code - Transmission Fluid Temperature Sensor 'B' Circuit Low

Quick Answer

The ATF (Automatic Transmission Fluid) Temperature Sensor converts the fluid temperature into a resistance value. Common causes include Faulty Transmission Fluid Temperature Sensor, Transmission Fluid Temperature Sensor harness is open or shorted, Transmission Fluid 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: P2742 Dodge indicates Transmission Fluid Temperature Sensor 'B' Circuit Low.
Common causes: Common causes include Faulty Transmission Fluid Temperature Sensor, Transmission Fluid Temperature Sensor harness is open or shorted, Transmission Fluid 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 3,537

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 Jan 30, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2742 Dodge Description

The ATF (Automatic Transmission Fluid) Temperature Sensor converts the fluid temperature into a resistance value. The sensor resistance changes with the transmission fluid temperature. As the temperature becomes higher, the sensor resistance decreases. The Transmission Control Module (TCM) monitors the ATF (Automatic Transmission Fluid) Temperature Sensor signal. The TCM sets the OBDII code when the ATF (Automatic Transmission Fluid) Temperature Sensor signal is out of factory specifications.

OBDII Code P2742 Dodge - Transmission Fluid Temperature Sensor 'B' Circuit Low - AutoCodes.com — P2742 Dodge Code - Transmission Fluid Temperature Sensor 'B' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2742 Dodge?

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

How to Fix the DTC P2742 Dodge?

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 P2742 Dodge 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 P2742 Dodge code?

Need more information on how to fix the P2742 Dodge code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2742 Dodge code diagnosed by a professional: Find a repair shop in your area

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 P2742 Dodge Code

1. What does the OBDII code P2742 mean on a Dodge vehicle?

P2742 indicates a problem with the Transmission Fluid Temperature (TFT) Sensor 'B' Circuit, specifically that it is reading a low voltage signal.

2. What are the common symptoms of code P2742 in a Dodge?

Symptoms may include erratic or harsh shifting, transmission overheating, the transmission going into limp mode, and the illumination of the check engine light.

3. What causes the P2742 code to appear?

Common causes include a faulty TFT sensor, damaged wiring or connectors in the sensor circuit, low or dirty transmission fluid, or an issue with the powertrain control module (PCM).

4. How can I fix the P2742 code on my Dodge?

Repairs often involve replacing the TFT sensor, repairing or replacing damaged wiring or connectors, flushing and refilling the transmission fluid, or reprogramming or replacing the PCM if necessary.

5. Can I still drive my Dodge with the P2742 code?

While the vehicle may still be drivable, continuing to drive with this code may cause further damage to the transmission. It's best to diagnose and repair the issue promptly.

6. How do I diagnose the P2742 code?

Start by checking the transmission fluid level and condition. Then inspect the wiring and connectors for damage or corrosion. If no issues are found, test the TFT sensor and circuit using a multimeter.

7. Is the P2742 code a serious issue?

Yes, it can be serious as it may lead to transmission overheating or failure if left unresolved. Prompt attention is recommended to avoid costly repairs.

8. How much does it cost to repair the P2742 code?

Repair costs vary depending on the issue. Replacing a TFT sensor may cost $100â€“$300, while repairing wiring or connectors could range from $50â€“$200. PCM repairs or reprogramming could be more expensive.

9. What does the Transmission Fluid Temperature Sensor do?

The TFT sensor monitors the temperature of the transmission fluid and sends this data to the PCM, which helps manage transmission performance and protect it from overheating.

10. Can low transmission fluid cause the P2742 code?

Yes, low or dirty transmission fluid can interfere with the operation of the TFT sensor and trigger the P2742 code. Always check and maintain proper fluid levels.