P0710
Transmission Fluid Temperature Sensor "A" Circuit
- Severity
- Medium
- Driving
- Drivable — book it in
A fault in the transmission fluid temperature sensor "A" circuit. The module uses fluid temperature to decide when to lock the torque converter, how firmly to shift and whether to allow full performance, so without a believable reading it takes a cautious default: shifts feel wrong, and the converter may never lock up.
Possible causes
- CommonFailed temperature sensor - often part of the internal solenoid pack
- CommonCorroded or fluid-contaminated case connector
- PossibleWiring damage between the transmission and the module
- PossibleInternal transmission harness failure
- PossibleLow fluid level leaving the sensor uncovered
What you might notice
- Harsh or delayed shifts, especially when cold
- Torque converter not locking up
- Higher fuel consumption
- Cooling fan running more than usual on some vehicles
- Check engine light on
What to check, in order
- Compare the reported fluid temperature with engine coolant temperature on a cold vehicle that has stood overnight. Both should read close to ambient. A reading far from ambient on a cold car proves the sensor wrong without any dismantling.
- Check the fluid level and condition.
- Inspect the transmission case connector for fluid ingress and corrosion.
- Check the wiring between the case connector and the module.
- On many transmissions this sensor is part of the internal solenoid pack or valve body, so replacing it means dropping the pan. Confirm the fault properly before starting.
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.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Transmission
P0700P0701P0702P0703P0704P0705P0706P0707P0708P0709P0710P0711P0712P0713P0714P0715P0716P0717P0718P0719P0720P0721P0722P0723P0724P0725P0726P0727P0728P0729P0730P0731P0732P0733P0734P0735P0736P0737P0738P0739P0740P0741P0742P0743P0744P0745P0746P0747P0748P0749P0750P0751P0752P0753P0754P0755P0756P0757P0758P0759P0760P0761P0762P0763P0764P0765P0766P0767P0768P0769P0770P0771P0772P0773P0774P0775P0776P0777P0778P0779P0780P0781P0782P0783P0784P0785P0786P0787P0788P0789P0790P0791P0792P0793P0794P0795P0796P0797P0798P0799