P0714

Transmission Fluid Temperature Sensor "A" Circuit Intermittent

Severity: Medium
Driving: Drivable — book it in

The fluid temperature signal from sensor "A" is dropping out intermittently. The module gets a plausible reading, loses it, and gets it back. As with all intermittent circuit faults, the cause is far more often a connection than a component.

Possible causes

CommonLoose or corroded pin at the transmission case connector
CommonChafed or fatigued wiring
CommonFluid wicking into the connector, intermittent as it moves
PossibleFailing sensor that drops out when hot
PossibleInternal transmission harness beginning to fail

What you might notice

Occasional harsh shift
Temperature reading jumping on the display
Fault comes and goes, often with temperature
Check engine light on intermittently

What to check, in order

Note whether it happens hot or cold. A fault that only appears once the transmission is up to temperature points at the sensor or the internal harness.
Wiggle-test the harness at the case connector with the live data screen showing fluid temperature.
Pull the case connector and look for fluid inside it.
Check the fluid level and condition.
Do not drop the pan on the strength of an intermittent code until the external wiring and connector have been cleared.

Read this code from your own car

Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.

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Where this code sits

B · Body C · Chassis P · Powertrain U · Network and communication