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

1. -

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

Trouble symptom:

Coolant temperature rises slowly
Poor acceleration

NOTE: After the faulty parts are repaired or replaced, perform the final check in Basic Diagnostic Procedure. Ref. to ENGINE (DIAGNOSTICS) (H4DO)>BASIC DIAGNOSTIC PROCEDURE>PROCEDURE .

CHECK DTC .
1. Turn the ignition switch to ON.
2. Using the Subaru Select Monitor or a general scan tool, read the DTC of [Engine]. Ref. 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)". Ref. to ENGINE (DIAGNOSTICS) (H4DO)>DIAGNOSTIC TROUBLE CODE (DTC)>LIST .
  
  No : Go to 2 .
CHECK THERMO-CONTROL VALVE ASSEMBLY OPENING ANGLE SENSOR .
1. Using the Subaru Select Monitor or a general scan tool, perform the clear memory of [Engine]. Ref. 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. Ref. 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.
CHECK THERMO-CONTROL VALVE ASSEMBLY OPENING ANGLE SENSOR .
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]. Ref. to COMMON (DIAG)>DIAGNOSTIC TROUBLE CODE (DTC) .
  Is DTC P26A5 displayed? (Past malfunction)
  
  Yes : Replace the thermo-control valve assembly. Ref. 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.