P0710 (blink 38, U441E) on Toyota Corolla E120: TRANSMISSION FLUID TEMPERATURE SENSOR MALFUNCTION

Short answer: P0710 means “TRANSMISSION FLUID TEMPERATURE SENSOR MALFUNCTION”. The car’s computer has found a fault in the ECT U441E system. First check: workshop check order (RM821E): INSPECT TRANSMISSION WIRE(ATF temperature sensor) -> CHECK WIRE HARNESS AND CONNECTOR(Transmission wire − ECU).

Code

P0710 · blink 38

System

ECT U441E

Dashboard light

CHECK ENGINE (MIL) does NOT light (DTC stored in memory only)

Applies to

4-speed A/T U441E. Not a PK fitment (the PK EPC lists only A246E and U340E). Other-market fitment unverified.

Confidence

high (official Toyota RM821E)

Source

toyotamanuals.gitlab.io

Symptoms and when it is set

1. Either (a) or (b) is detected for 0.5 sec. or more. (2−trip detection logic) (a) Temperature sensor resistance is less than 79 W (b) After the engine has been operating for 15 minutes or more, the resistance at the temp. sensor is more than 156 kW

Likely causes

1. Wire harness; ATF temperature sensor; Engine ECU

What to check, in order

1. Workshop check order (RM821E): INSPECT TRANSMISSION WIRE(ATF temperature sensor) -> CHECK WIRE HARNESS AND CONNECTOR(Transmission wire − ECU)

Related on this car

• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

Same code on other cars

• P0710 · Toyota Passo (1st gen)
• P0710 · Toyota Vitz (1st gen)
• P0710 · Toyota Corolla (11th gen, E170)
• P0710 · Toyota Corolla (10th gen, E140)
• P0710 · Honda City (5th gen, GM2)
• P0710 · Honda Civic (10th gen, FC)
• P0710 · Suzuki Wagon R (Pakistan, K10B)
• P0710 on all cars compared

← P0500/42 P0753/62 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.