DTC P16B4-79: Multi Flow Control Valve Stopper Mechanical Linkage Failure [10/2022 - ]: Procedure

1. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   P16B4-79 and other DTCs are output	A
   P16B4-79 is output	B

   HINT: 

   If any DTCs other than P16B4-79 are output, troubleshoot those DTCs first.

Result: 

A 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 08/2023]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2023 - 10/2024]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [10/2024 - ] 

Result: 

B 

See step  2

1. Perform a customer problem analysis to check whether overheating occurred.

   HINT: 

   Check whether "High coolant temperature warning light" was displayed on the combination meter.

   Result

   Result	Proceed to
   Overheating occurred	A
   Overheating did not occur	B

Result: 

B 

See step  7

Result: 

A 

See step  3

1. Check the engine coolant quantity.

   Refer to ON-VEHICLE INSPECTION [10/2022 - ]

   Result

   Result	Proceed to
   At or below reserve tank LOW level or trace of coolant boiling over	A
   At or above reservoir tank LOW level and no trace of coolant boiling over	B

Result: 

B 

See step  7

Result: 

A 

See step  4

1. Check the engine cooling system for coolant leaks.

   Refer to ON-VEHICLE INSPECTION [10/2022 - ]

   OK

   No leaks.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

See step  6

Result: 

NG 

See step  5

1. Repair any engine coolant leaks.

   HINT: 

   Check for damage to parts due to overheating and replace any abnormal parts.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  6

1. Fill the reservoir tank up to the FULL line with engine coolant.

   HINT: 

   • Refer to REPLACEMENT [10/2022 - ]
   • Add engine coolant and perform air bleeding after repair.

   Result

   Proceed to
   NEXT

Result: 

NEXT 

See step  7

HINT: 

Refer to REMOVAL [10/2022 - ]

Result

Result: 

NEXT 

REPLACE COOLANT 

Refer to REPLACEMENT [10/2022 - ]

HINT: 

When replacing any cooling system parts, if excessive deposits of rust or scale exist or the concentration of the engine coolant is abnormal, replace the engine coolant.