DTC P26A5: Engine Coolant Bypass Valve "A" Position Sensor Circuit Range/Performance: Notes

DTC detecting condition: 

Detected when two consecutive driving cycles with fault occur.

Trouble symptom: 

• Coolant temperature rises slowly
• Poor acceleration

1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Refer to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC other than P26A5 displayed? (Current malfunction)

   Yes  : Check the appropriate DTC using the "Diagnostic Trouble Code (DTC)". Refer to ENGINE (DIAGNOSTICS) (H4DO)>Diagnostic Trouble Code (DTC)>LIST .

   No  : Go to  2.

1. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Refer to COMMON (DIAG)>CLEAR MEMORY .
2. Start the engine and warm up completely.
3. Turn the ignition switch to OFF and wait for at least 3 minutes.
4. Turn the ignition switch to ON.
5. Read the temporary code using the Subaru Select Monitor or general scan tool. Refer to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC P26A5 displayed? (Temporary code)

   Yes  : Go to  3.

   No  : Even if DTC is detected, the thermo-control valve assembly has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.

1. Start the engine and warm up completely.
2. Turn the ignition switch to OFF and wait for at least 3 minutes.
3. Turn the ignition switch to ON.
4. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Refer to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .

   Is DTC P26A5 displayed? (Past malfunction)

   Yes  : Replace the thermo-control valve assembly. Refer to COOLING(H4DO)>THERMO CONTROL VALVE ASSEMBLY .

   No  : Even if DTC is detected, the thermo-control valve assembly has returned to a normal condition at this time. Reproduce the failure, and then perform the diagnosis again.