DTC P167A or P167B. Cadillac XLR 2004

For 1990-2009 cars only

Makes 🢒 Cadillac 🢒 2004 🢒 XLR 🢒 DTC 🢒 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	Observe the Freeze Frame/Failure Records for this DTC. Turn OFF the ignition for 30 seconds. 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