P0791 2013 Toyota RAV4 Code - Intermediate Shaft Speed Sensor 'A' Circuit
Quick Answer
This sensor detects the rotation speed of the counter gear which indicates the output speed of the transaxle. Common causes include Faulty Speed sensor NC (Transmission Revolution Sensor), Speed sensor NC harness is open or shorted, Speed sensor NC 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
- P0791 2013 Toyota RAV4 indicates Intermediate Shaft Speed Sensor 'A' Circuit.
- Common causes
- Common causes include Faulty Speed sensor NC (Transmission Revolution Sensor), Speed sensor NC harness is open or shorted, Speed sensor NC 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 P0791 2013 Toyota RAV4 Description
The NT terminal of the ECM detects a pulse signal from the speed sensor NT (input RPM). The ECM calculates gear shifts by comparing the signal from speed sensor NT with the signal from speed sensor NC.
While the vehicle is operating in 2nd, 3rd, 4th, or 5th gear with the shift lever in D, if the input shaft speed is less than 300 rpm although the output shaft speed is more than 1000 rpm, the ECM interprets this as a fault, illuminates the MIL and stores the Diagnostic Trouble Code (DTC). P0791 code is detected when the input speed sensor voltage is more than 1.9V or less than 0.1V for 2 seconds or more.
What are the Possible Causes of the DTC P0791 2013 Toyota RAV4?
- Faulty Speed sensor NC (Transmission Revolution Sensor)
- Speed sensor NC harness is open or shorted
- Speed sensor NC circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0791 2013 Toyota RAV4?
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 P0791 2013 Toyota RAV4 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.
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Frequently Asked Questions about P0791 2013 Toyota RAV4 Code
1. What does the OBDII code P0791 mean on a 2013 Toyota RAV4?
The P0791 code indicates that there is an issue with the Intermediate Shaft Speed Sensor 'A' Circuit in the vehicle's transmission system.
2. What are common symptoms of code P0791 in a 2013 Toyota RAV4?
Symptoms include the transmission slipping, harsh shifting, the vehicle going into limp mode, and the check engine light turning on.
3. What causes the OBDII code P0791 to appear in a 2013 Toyota RAV4?
Common causes include faulty intermediate shaft speed sensor, damaged wires or connectors in the sensor circuit, or issues with the transmission control module.
4. How can I diagnose the problem leading to code P0791 in my 2013 Toyota RAV4?
Diagnosis involves using a scan tool to read the fault code and live data, visually inspecting the wiring and connectors, and potentially testing the sensor itself with a multimeter.
5. What steps are involved in fixing the P0791 code on a 2013 Toyota RAV4?
Repair steps typically include replacing the intermediate shaft speed sensor, repairing or replacing damaged wiring, and ensuring connectors are clean and secure. It may also require updating or replacing the transmission control module if found faulty.
6. Is it safe to drive my 2013 Toyota RAV4 with the P0791 code?
While you can drive for short distances, it's advisable to address the issue promptly as the transmission may experience further problems, potentially leading to safety issues or more costly repairs.
7. Can I fix the P0791 code on my 2013 Toyota RAV4 by myself?
If you have experience with automotive diagnostics and repairs, particularly with transmission systems, you might manage to fix it. However, due to the complexity involved, seeking professional assistance is often recommended.
8. How urgent is it to repair a P0791 fault code in a 2013 Toyota RAV4?
It's moderately urgent to repair this issue to prevent further transmission damage. Delaying repairs could lead to the vehicle becoming undriveable.
9. What tools are needed to diagnose and repair the P0791 code in a 2013 Toyota RAV4?
Essential tools include an OBDII scanner, a multimeter for testing electrical components, and basic hand tools for accessing and replacing the sensor or wiring.
10. Could the P0791 code in a 2013 Toyota RAV4 be triggered by low transmission fluid levels?
While low transmission fluid itself doesn't directly trigger this code, it can lead to transmission issues that might cause the sensor to malfunction. Always ensure fluid levels are correct and the fluid is in good condition.
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