Bank 2

1. Was the "On-Board Diagnostic (OBD) System Check" performed?

[YES] Go to Step 2.
[NO] Go to OBD System Check. Description of On-Board Diagnostics

2. a. Remove the Bank Heated Oxygen Sensor (HO2S) 2.
b. Install the Exhaust Backpressure Tester (BT-8515-V or equivalent) in place of the Bank 2 HO2S 2.
c. Run the engine at normal operating temperature.
d. Increase the engine speed to 2000 RPM and allow 10 seconds for pressure to build.
e. Observe the exhaust system backpressure reading on the gauge.
f. Does the reading exceed the amount in the value column?

[VALUES] 8.62 kPa (1.25 psi).

[YES] Go to Step 3.
[NO] Go to Step 4.

3. a. Repair the restriction in the exhaust system after the catalytic converter.
b. Possible faults include:
- Collapsed pipe.
- Heat distress.
- Internal muffler failure.
c. Is the action complete?

[YES] Verify repair.

4. a. Install the Bank 2 HO2S 2.
b. Install the Exhaust Backpressure Tester in place of Bank 2 HO2S 2.
c. Run the engine at normal operating temperature.
d. Increase the engine speed to 2000 RPM and allow 10 seconds for pressure to build.
e. Observe the exhaust system backpressure reading on the gauge.
f. Does the reading exceed the amount in the value column?

[VALUES] 8.62 kPa (1.25 psi).

[YES] Go to Step 5.
[NO] No trouble found. If a driveability symptom exists, refer to Diagnosis by Symptom.

5. a. Repair the restriction in the catalytic converter.
b. Is the action complete?

[YES] Verify repair.

NOTE: DTCs will be set by running the vehicle to normal operating temperature after a cold start with the Oxygen (O2) sensor disconnected. After performing these tests, use the scan tool to erase the DTCs that were set by the lack of O2 sensor activity.