Restricted Exhaust

Restricted Exhaust

Test Description

The numbers below refer to the step numbers on the diagnostic table.

3

The exhaust system has very low back pressure under normal conditions. If the exhaust system is restricted, a significant increase in the exhaust pressure is noticed on an exhaust back pressure gauge.

Removing the heated oxygen (HO2S) sensor may set a diagnostic trouble code (DTC). When finishing this diagnostic table, be sure to clear all codes.

4

This step will isolate the catalytic converter from the remainder of the exhaust system.