Input/Turbine Speed Sensor A Circuit Intermittent

What it means

The computer has seen the input speed sensor signal drop out briefly and then return. This pattern usually points to a poor connector contact or a partly broken wire affected by vibration or heat, and it can cause sudden shifts or a temporary limp mode.

Related codes: P0715P0716P0717P0723P0700

Symptoms4

• Check engine light coming on and off.
• Occasional harsh or sudden shifts.
• Temporary limp mode that clears after restarting the engine.
• Brief jumps in the input speed reading on a scan tool.

Possible causes5

• Poor contact or corrosion at the sensor connector pins.
• A partly broken wire near the transmission affected by movement and vibration.
• A sensor that fails temporarily when hot.
• Fluid inside the connector.
• A weak ground connection.

How to diagnose5

1. Record input speed during a road test and look for sudden drops to zero.
2. Gently move the connector and wiring while watching the reading to find the break.
3. Inspect the connector pins for tightness, fluid or corrosion.
4. Compare when the fault appears with transmission temperature to see if the sensor is heat sensitive.
5. Measure sensor resistance cold and hot and compare with the manufacturer specification.

How to fix5

1. Clean the connector and tighten the pins, or replace it.
2. Repair the partly broken wire and secure the harness.
3. Repair the weak ground connection.
4. Replace the sensor if it is proven to fail when hot.
5. Clear the codes and confirm the reading stays steady on a long drive.

Repair cost

In Saudi riyals; the highlighted part is the expected range for this fault.

A connector or wire repair usually solves it at low cost; the cost rises when the sensor must be replaced, especially if it is inside the transmission.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions