DTC P0024 "B" Camshaft Position - Timing Over-Advanced Or System Performance Bank 2: Notes

DTC detecting condition:

Detected when two consecutive driving cycles with fault occur.

Trouble symptom:

Engine stalls.
Improper idling
CAUTION: After servicing or replacing faulty parts, perform Clear Memory Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Clear Memory Mode>OPERATION . and Inspection Mode Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Inspection Mode>PROCEDURE .

CHECK CURRENT DATA.
1. Start the engine and let it idle.
2. Using the Subaru Select Monitor, read the value in [Exh. VVT Retard Ang. L].
  NOTE: For detailed operation procedures, refer to "READ CURRENT DATA FOR ENGINE". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Subaru Select Monitor .
Is the value of [Exh. VVT Retard Ang. L] approx. 0 deg?
- Yes : Go to 2.
- No : Check the following item and repair or replace if necessary.
  - Exhaust cam sprocket (clog or dirt of oil routing, setting of spring)
  - Exhaust camshaft (dirt, damage of camshaft)
CHECK CURRENT DATA.
1. Drive with acceleration and deceleration at 80 km/h (50 MPH) or less.
  NOTE: Drive to an extent that the duty output of oil flow control solenoid valve increases.
2. Using the Subaru Select Monitor, read the values in [Exh. OCV Duty L] and [Exh. VVT Retard Ang. L].
  NOTE: For detailed operation procedures, refer to "READ CURRENT DATA FOR ENGINE". Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>Subaru Select Monitor .
When the value of [Exh. OCV Duty L] increases from 10%, is the value of [Exh. VVT Retard Ang. L] approx. 0 deg?
- Yes : Check the following item and repair or replace if necessary.
  - Exhaust cam sprocket (clog or dirt of oil routing, setting of spring)
  - Exhaust camshaft (dirt, damage of camshaft)
- No : Perform the following procedures, and clean the oil routing.
  Replace the engine oil and idle the engine for 5 minutes, and then replace the oil filter and engine oil. Ref. to LUBRICATION(H4DO)>Engine Oil>REPLACEMENT . Ref. to LUBRICATION(H4DO)>Engine Oil Filter .