CorollaFix

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

  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. ATF temperature sensor; Wire harness; Engine CU

Related on this car

Same code on other cars

← P0500/42 P0711/38 →

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.