DRIVE SHAFT SYSTEM > Front Hub Unit Bearing
INSPECTION
1. Moving the front tire up and down by hand, check there is no looseness in bearing, and check the wheel rotates smoothly.
CAUTION:
If there is unsmooth sliding operation or abnormal noise in the bearing, replace the hub unit bearing.

2. Inspect the hub unit bearing for axial looseness.
(1) Remove the tire and disc rotor.
(2) Using a dial gauge, check the axial looseness. Replace the hub unit bearing if looseness exceeds the limit.
Service limit:
Maximum: 0.05 mm (0.0020 in)

Disassembly
InstallationDtc p2196 a/f /o2 sensor signal biased/stuck rich bank 1 sensor 1
ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)DTC P2196 A/F /O2 SENSOR SIGNAL BIASED/STUCK RICH BANK 1 SENSOR 1DTC DETECTING CONDITION:Detected when two consecutive driving cycles with fault occur.CAUTION:After servicing or replacing faulty parts, perform Cle ...
Removal
EMISSION CONTROL (AUX. EMISSION CONTROL DEVICES)(H4DO) > EGR Control ValveREMOVAL1. Disconnect the ground cable from battery.2. Remove the clip (A) from the air intake boot.3. Loosen the clamp (B) connecting the air intake boot and air cleaner case (rear).4. Loosen the clamp (C) which connects th ...
Tire inspection
Perform a visual inspection of the tires on your Subaru Ascent on a daily basis
to ensure they are free from serious damage, embedded nails, stones, or other foreign
objects. At the same time, carefully examine the tread surface for any signs of
uneven or abnormal wear, which may indicate unde ...