DTC P2C90-00: Crankcase Ventilation System - Hose "A" Disconnected [03/2023 - ]: Procedure

1. Read the DTCs.

   Powertrain > Engine > Trouble Codes 

   Result

   Result	Proceed to
   P2C90-00 and other DTCs are output	A
   P2C90-00 is output	B

   NOTE:

   If the Freeze Frame Data "Initial Engine Coolant Temperature" is 0°C (0°F) or less, the hose may be temporarily clogged due to freezing

   HINT: 

   If any DTCs other than P2C90-00 are output, troubleshoot those DTCs first.

Result: 

A 

GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2023 - 03/2024]  , or Refer to  DIAGNOSTIC TROUBLE CODE CHART [03/2024 - ] 

Result: 

B 

See step  2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Check the PCV hose connections.

   OK

   PCV hose is connected correctly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

SECURELY RECONNECTION PCV HOSE 

Result: 

OK 

See step  3

1. Check the PCV hose clogged and damaged.

   OK

   PCV hose is not clogged and damaged.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CLEAN OR REPLACE PCV HOSE 

Result: 

OK 

See step  4

1. Check the PCV hose clogged and damaged.

   OK

   PCV hose is not clogged and damaged.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CLEAN OR REPLACE PCV HOSE 

Result: 

OK 

See step  5

1. Inspect the air inlet duct.

   OK

   PCV fresh air port of the air inlet duct is not clogged and damaged.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

CLEAN OR REPLACE AIR INLET DUCT 

Result: 

OK 

See step  6

1. Inspect the cylinder head cover.

   OK

   PCV fresh air port and PCV pressure sensor port of the cylinder head cover is not clogged and damaged.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

CLEAN OR REPLACE CYLINDER HEAD COVER