P0710 (blink 38) 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 U340E system and turns on the Malfunction indicator lamp (Check Engine). First check: ATF temperature sensor; Wire harness; Engine CU.
- Code
- P0710 · blink 38
- System
- ECT U340E
- Dashboard light
- Malfunction indicator lamp (Check Engine)
- Applies to
- 4-speed A/T U340E. PK: ZZE122R-GEPNKP 1.8 auto from 07.2005 (EPC fig 3501/3512 note (0507- )ATM..PKN); JDM NZE121 1NZ autos
- Confidence
- high (official Toyota RM821E)
- Source
- toyotamanuals.gitlab.io
Symptoms and when it is set
- 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
- ATF temperature sensor; Wire harness; Engine CU
Related on this car
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
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.

