GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Cadillac 🢒 2004 🢒 XLR 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 DTC P167A or P167B

Description

This diagnostic identifies a fault in the communication system between the integrated circuit that operates the wide band heated oxygen sensor (HO2S) and the main microprocessor. The following DTCs are diagnosed in this table:

    • DTC P167A control module HO2S bank 1 sensor 1 system performance
    • DTC P167B control module HO2S bank 2 sensor 1 system performance

Step

Action

Yes

No

1

Did you perform the Diagnostic System Check-Vehicle?

Go to Step 2

Go to Diagnostic System Check - Vehicle in Vehicle DTC Information

2
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.

Did the DTC fail this ignition?

Go to Step 3

Go to Intermittent Conditions

3

Replace the engine control module (ECM). Refer to Engine Control Module Replacement .

Did you complete the replacement?

Go to Step 4

--

4

Does the scan tool display any DTCs that you have not diagnosed?

Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information

System OK