P2740 Code - Transmission Fluid Temperature Sensor 'B' Circuit
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
- P2740 indicates Transmission Fluid Temperature Sensor 'B' Circuit.
- 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.
Code P2740 Description
What are the Possible Causes of the DTC P2740?
- 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 P2740?
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 P2740 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 P2740 code?
Need more information on how to fix the P2740 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2740 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P2740 Dodge — Transmission Fluid Temperature Sensor 'B' Circuit
Frequently Asked Questions about P2740 Code
1. What are the common symptoms of OBDII code P2740 related to the Transmission Fluid Temperature Sensor 'B' Circuit?
- Common symptoms include issues with shifting gears, transmission slipping, reduced fuel efficiency, and an illuminated check engine light.
2. What are the possible causes of OBDII code P2740?
- Possible causes include a faulty transmission fluid temperature sensor, damaged wiring or connectors in the sensor circuit, low transmission fluid levels, or a malfunctioning engine control module (ECM).
3. How can I diagnose the Transmission Fluid Temperature Sensor 'B' Circuit issue?
- Diagnosing this issue involves using an OBDII scanner to retrieve the specific trouble code, checking the transmission fluid level and condition, inspecting the sensor and its wiring for damage, and testing the sensor's resistance.
4. Can I continue driving with OBDII code P2740 present?
- It is not recommended to continue driving with this code present, as it can lead to further damage to the transmission and potentially result in more costly repairs.
5. How can I repair OBDII code P2740 related to the Transmission Fluid Temperature Sensor 'B' Circuit?
- Repair options include replacing the faulty transmission fluid temperature sensor, repairing or replacing damaged wiring or connectors, ensuring proper transmission fluid levels, and resetting the ECM to clear the code.
6. Is it possible for a DIY enthusiast to fix OBDII code P2740 at home?
- While some experienced DIY enthusiasts may be able to diagnose and repair this issue at home, it is recommended to seek professional help, especially when dealing with transmission-related problems.
7. How much does it typically cost to repair OBDII code P2740?
- The cost of repairing this code can vary depending on the underlying issue, but it may range from $100 to $300 for parts and labor if the sensor or wiring needs replacement.
8. Can OBDII code P2740 be triggered by something other than a faulty sensor?
- Yes, other factors such as low transmission fluid levels, damaged wiring, or ECM malfunctions can also trigger this trouble code.
9. What long-term effects can OBDII code P2740 have if left untreated?
- If left untreated, this code can lead to transmission issues, reduced fuel efficiency, and potential damage to other transmission components, which could result in more extensive repairs.
10. How often should the transmission fluid temperature sensor be checked to prevent OBDII code P2740 from occurring?
- It is recommended to include checking the transmission fluid temperature sensor during regular maintenance intervals or whenever you experience symptoms related to transmission problems to prevent the occurrence of OBDII code P2740.
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