Isuzu 2000 Trooper Workshop Manual page 1074

DTC P0153 – HO2S Slow Response Bank 2 Sensor 1
Step
1 Was the "On-Board Diagnostic (OBD) System Check"
performed?
2 NOTE: If any DTCs are set, (except P0133, P1133,
P1134, P1153, and/or P1154), refer to those DTCs
before proceeding with this diagnostic chart.
1. Install the Tech 2.
2. Idle the engine at operating temperature.
3. Operate the vehicle within parameters specified
under "Conditions for Setting the DTC" criteria
included in Diagnostic Support.
4. Using a Tech 2, monitor "DTC" info for DTC P0153
until the DTC P0153 test runs.
5. Note the test result.
Does the Tech 2 indicate DTC P0153 failed this
ignition?
3 Did the Tech 2 also indicate DTC P0153, P1133,
P1134, P1153, and/or P1154 test failed this ignition?
4 Check for leaks at the pipe joints.
Are the joints leaking?
5 Tighten the U-bolt nuts at the leaking joint.
Is your action complete?
6 Check for gaskets that are damage or improperly
installed.
Are there damaged or misaligned gaskets?
7 1. Replace the damaged gaskets.
2. Align the connections.
3. Tighten the connections.
Is your action complete?
8 Check for loose exhaust flange connections.
Are the flange connections loose?
9 Tighten the stud nuts or bolts to specifications.
Is your action complete?
10 Check for burned or corroded exhaust pipes.
Are the exhaust pipes burned or corroded?
11 Replace the exhaust pipes, as required.
Is your action complete?
12 Check for leaks at the exhaust manifold.
Are there leaks at the exhaust manifold?
13 Tighten the bolts to specifications or replace the
manifold if necessary.
Is your action complete?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Action Value(s) Yes
— Go to Step 2
Go to Step 3
—
— Go to Step 17
— Go to Step 5
— Go to Step 2
— Go to Step 7
— Go to Step 2
— Go to Step 9
— Go to Step 2
— Go to Step 11
— Go to Step 2
Go to Step 13
—
— Go to Step 2
6E–205
No
Go to OBD
System
Check
Refer to
Diagnostic
Aids
Go to Step 4
Go to Step 6
—
Go to Step 8
—
Go to Step 10
—
Go to Step 12
—
Go to Step 14
—