P0713Generic code

P0713 Code: Transmission Fluid Temperature Sensor A Circuit High

The P0713 code means the signal from the transmission fluid temperature sensor is above its maximum value. The main effect is harsh shifts or a torque converter that does not lock up.

Severity
Medium
Can I keep driving?
Yes, but with caution
Estimated cost
$40 to $500
Difficulty
Medium
System
Transmission
Applies to
All OBD2 vehicles

Updated Reviewed by Renzo Chacca

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What the P0713 code means

The sensor measures the temperature of the transmission fluid. The computer uses it to adjust pressure, shift smoothness and torque converter lockup, and to protect the transmission from overheating.

The sensor changes its resistance with temperature, and the computer measures the resulting voltage. A high signal is usually caused by an open circuit or an interrupted ground. That is what sets the P0713 code.

Without this signal the computer uses a fixed value, so shifts can be harsh when cold or the torque converter may not lock up. On many transmissions the sensor is part of the internal harness, so it is replaced by removing the pan. See the sensor guide to learn how to test it.

To confirm the fault, measure the continuity of each wire between the component connector and the computer connector with the key off. It should be under 1 ohm, and an infinite reading means the wire is open. If the wiring checks out, measure the component itself: an infinite resistance confirms it is open inside.

P0713 code symptoms

  • Check engine light on.
  • Harsh shifts or a torque converter that does not lock up.
  • Harsh shifts when the transmission is cold.
  • Engine rpm a little high on the highway.

Likely causes of the P0713 code

  1. Loose or broken connector. The most frequent cause.
  2. Signal or ground wire cut, so the signal rises to the reference.
  3. Sensor open inside. The resistance reads infinite.
  4. Short to 5 or 12 volts from rubbing against another wire in the harness.

How to diagnose the P0713 code step by step

  1. Read the sensor value on the scan tool and compare it with what is expected.
  2. Inspect the connector for corrosion, water and loose pins.
  3. Check power and ground with the key on: a correct reference and less than 0.1 volt drop on the ground.
  4. Measure the signal with the connector plugged in and see whether it changes with the condition.
  5. Do a wiggle test of the wiring with the scan tool in graph mode.
  6. Check the continuity of each wire back to the computer (under 1 ohm).
  7. With the transmission cold, compare its temperature with the coolant temperature. They should be close to each other.

How to fix the P0713 code

  • Repair the connector or the wiring.
  • Replace the sensor if the tests confirm it is bad.
  • Correct the real condition if there is one.
  • Clear the P0713 code and verify with a road test.

Technical reference data

  • NTC thermistor: high resistance when cold and low resistance when hot.
  • Normal fluid temperature: 70 to 95 °C (158 to 203 °F).
  • Reference values only: check the manufacturer data for your vehicle.

Brand-specific notes

The source notes how the sensor is mounted on two brands.

P0713 on GM

On GM the sensor is built into the internal harness of the transmission or into the control module.

P0713 on Ford

On Ford the sensor is built into the internal harness of the transmission or into the control module.

Frequently asked questions about P0713

What does the P0713 code mean?
It means the computer sees a signal above its maximum value, usually from an open circuit or an interrupted ground from the transmission fluid temperature sensor.
Can I drive with a P0713 code?
Yes, with caution. Expect harsh shifts or a converter that does not lock, and avoid towing or hard use until it is checked.
Do I have to replace the sensor?
Only if the tests confirm it. The connector and the wiring fail just as often.
What does the transmission fluid temperature sensor do?
It measures the temperature of the transmission fluid. The computer uses it to adjust pressure, shift smoothness and torque converter lockup, and to protect the transmission from overheating.
How much does it cost to fix P0713?
As a rough guide, between $40 and $500, depending on whether it is a connector, wiring or a new sensor.

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