Dtc P0133 – Ho2S Slow Response Bank 1 Sensor 1 - Isuzu Trooper 1999 Workshop Manual

6E–170
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
DTC P0133 – HO2S Slow Response Bank 1 Sensor 1
Step
1 Was the "On-Board Diagnostic (OBD) System Check"
performed?
2 NOTE: If any DTCs are set (expect P0153, 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" included in
Diagnostic Support.
4. Using a Tech 2, monitor "DTC" info for DTC P0133
until the DTC P0133 test runs.
5. Note the test result.
Does the Tech 2 indicate DTC P0133 failed this
ignition?
3 Did the Tech 2 also indicate DTC P0153, P1133,
P1134, P1153, and/or P1154 failed this ignition?
4 Check for leaks at the pipe joints.
Are the joints leaking?
5 Tighten the U–bolt nuts at the leaking joints.
Is the action complete?
6 Check for gaskets that are damaged or improperly
installed.
Are there damaged or misaligned gaskets?
7 1. Replace damaged gaskets.
2. Align the connections.
3. Tighten the connections.
Is the action complete?
8 Check for loose exhaust flange connections.
Are the flange connections loose?
9 Tighten the stud nuts or bolts to specifications.
Is the 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 the action complete?
12 Check for leaks at the exhaust manifold.
Are there leaks at the exhaust manifold?
13 Tighten the bolts to specifications to replace the
manifold if necessary.
Is the action complete?
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 2
— Go to Step 2
— Go to Step 11
— Go to Step 2
Go to Step 13
—
— Go to Step 2
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
—