Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
P0716 - Input Speed Sensor 1 Circuit Performance: Notes
For a complete wiring diagram, refer to appropriate Wiring Diagram.
Theory Of Operation
The transmission control system uses three speed sensors, one to measure input RPM, one to measure Transfer Speed output RPM of the main transmission assembly, and a third to measure the final transmission output RPM. These inputs are essential for proper transmission operation. Therefore, the integrity of this data is verified through system checks.
- >>When Monitored:<< The transmission gear ratio is monitored continuously while the transmission is in gear.
- >>Set Condition:<< If there is an excessive change in the Input RPM in any valid gear (R, 1st, 2nd, 3rd, or 4th).
| Possible Causes |
|---|
| (T52) INPUT SPEED SIGNAL CIRCUIT OPEN |
| (T13) SPEED SENSOR GROUND CIRCUIT OPEN |
| (T52) INPUT SPEED SIGNAL CIRCUIT SHORTED TO GROUND |
| (T52) INPUT SPEED SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| (T13) SPEED SENSOR GROUND CIRCUIT SHORTED TO VOLTAGE |
| INPUT SPEED SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to TRANSMISSION PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.