P2742 Code - Transmission Fluid Temperature Sensor 'B' Circuit Low
Quick Answer
The P2742 diagnostic trouble code indicates that there is an issue with the Transmission Fluid Temperature Sensor 'B' Circuit, specifically that the sensor is reading a low voltage signal. Common causes include Faulty Transmission Fluid Temperature Sensor 'B', Wiring issues or a poor connection in the sensor circuit, Low transmission fluid level. 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 indicates Transmission Fluid Temperature Sensor 'B' Circuit Low.
- Common causes
- Common causes include Faulty Transmission Fluid Temperature Sensor 'B', Wiring issues or a poor connection in the sensor circuit, Low transmission fluid level.
- 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 P2742 Description
The P2742 diagnostic trouble code indicates that there is an issue with the Transmission Fluid Temperature Sensor 'B' Circuit, specifically that the sensor is reading a low voltage signal. This sensor is responsible for monitoring the temperature of the transmission fluid. When the sensor detects that the transmission fluid temperature is too low, it sends a signal to the engine control module (ECM) to adjust various parameters to ensure optimal performance and efficiency.
Common Causes of P2742
- Faulty Transmission Fluid Temperature Sensor 'B'.
- Wiring issues or a poor connection in the sensor circuit.
- Low transmission fluid level.
- Faulty ECM.
- Extreme temperatures affecting sensor readings.
Symptoms of P2742
- Check Engine Light illuminated on the dashboard.
- Rough or delayed gear shifts.
- Poor fuel efficiency.
- Transmission slipping.
- Overheating of the transmission fluid.
How to Fix P2742
- Begin by diagnosing the issue using a scan tool to confirm the P2742 code and identify the specific cause.
- Inspect the wiring and connections related to the Transmission Fluid Temperature Sensor 'B' for any damage or corrosion. Repair or replace as necessary.
- Check the transmission fluid level and condition. Top up or replace the fluid if needed.
- Test the Transmission Fluid Temperature Sensor 'B' using a multimeter to ensure it is functioning properly. Replace the sensor if it is faulty.
- Clear the trouble code from the ECM's memory and road test the vehicle to ensure the issue has been resolved.
Cost to Fix P2742
The typical repair costs for addressing the P2742 code can vary depending on the specific cause of the issue. In general, replacing a faulty Transmission Fluid Temperature Sensor 'B' can cost between $100 and $200, including parts and labor. However, if the problem is related to wiring issues or a faulty ECM, the repair costs can increase significantly. It's important to consider the diagnosis time and labor rates at auto repair shops, which can range from $80 to $150 per hour. For a more accurate estimate, it is recommended to consult with a local auto repair shop.
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Code P2742 Information for Specific Makes
- P2742 Dodge — Transmission Fluid Temperature Sensor 'B' Circuit Low
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