Transmission Fluid Temperature Sensor A Circuit Intermittent
P0714 indicates an intermittent electrical fault in the transmission fluid temperature sensor A circuit. The sensor signal is dropping in and out or showing inconsistent readings, preventing the PCM from reliably monitoring transmission fluid temperature and adjusting shift timing accordingly.
What You Might Notice
- Check engine light illuminated
- Harsh or delayed gear shifts
- Improper torque converter clutch operation
- Transmission shifting erratically or at wrong RPM
- Poor fuel economy
Most Common Causes
- 1
Faulty transmission fluid temperature sensor
The sensor itself may be failing or becoming intermittent, causing unstable voltage signals to the PCM. This is the most common cause of this code.
- 2
Wiring or connector problems
Corroded, loose, or damaged wiring and connectors in the sensor circuit can cause intermittent electrical contact and signal loss.
- 3
PCM or transmission control module fault
A failing PCM may misinterpret sensor signals or have internal circuit issues affecting the temperature sensor input.
- 4
Transmission internal problems
Rarely, transmission fluid contamination or internal failure can affect sensor operation, though this usually accompanies other transmission codes.
How to Diagnose It
- 1
Check Faulty transmission fluid temperature sensor — The sensor itself may be failing or becoming intermittent, causing unstable voltage signals to the PCM. This is the most common cause of this code.
- 2
Check Wiring or connector problems — Corroded, loose, or damaged wiring and connectors in the sensor circuit can cause intermittent electrical contact and signal loss.
- 3
Check PCM or transmission control module fault — A failing PCM may misinterpret sensor signals or have internal circuit issues affecting the temperature sensor input.
- 4
Check Transmission internal problems — Rarely, transmission fluid contamination or internal failure can affect sensor operation, though this usually accompanies other transmission codes.
How to Fix It
- 1
Inspect and repair sensor wiring
Examine the transmission fluid temperature sensor wiring harness and connectors for corrosion, loose connections, or damage. Clean corroded connectors and reseat any loose connections.
- 2
Replace transmission fluid temperature sensor
Remove and replace the transmission fluid temperature sensor A with a new OEM or quality equivalent unit. This is often located on or near the transmission pan or valve body.
- 3
Check transmission fluid condition
Inspect transmission fluid color and smell for signs of contamination or overheating. Low or dirty fluid can affect sensor accuracy. Change fluid if necessary.
- 4
Test PCM and reprogram if needed
If the sensor and wiring test good, the PCM may need software update or replacement. Have a professional transmission specialist diagnose with advanced scanning tools.
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