DIAGNOSTIC PROCEDURE
DTC P0135, P0141, P0155, P0161 (MZI-3.7) DIAGNOSTIC PROCEDURE
STEP
INSPECTION
ACTION
1
VERIFY FREEZE FRAME DATA HAS
BEEN RECORDED
z
Has FREEZE FRAME DATA been
recorded?
Yes Go to the next step.
No Record FREEZE FRAME DATA on the repair
order, then go to the next step.
2
VERIFY RELATED REPAIR
INFORMATION AVAILABILITY
z
Verify related Service Bulletins and/or
on-line repair information availability.
z
Is any related Service Bulletins
available?
Yes
Perform repair or diagnosis according to the
available Service Bulletins.
z
If the vehicle is not repaired, go to the
next step.
No
Go to the next step.
3
INSPECT FOR SOURCE OF
POTENTIAL HO2S CONTAMINATION
z
Investigate the following items as
potential sources of HO2S
contamination:
{
Use of unapproved silicon sealers
{
Fuel contaminated by silicon
additives
{
Excessive oil consumption
{
Glycol leaking internally in the
engine
{
Lead-contaminated fuel
{
Short drive cycles in cold
weather
{
Use of unapproved cleaning
agents
z
Is a concern present?
Yes
Repair the source of the contamination. Change
the engine oil and oil filter. Then go to the next
step.
No
Go to the next step.
4
VISUALLY INSPECT HO2S WIRING
HARNESS
z
Connect the PCM connector.
z
Visually inspect the HO2S wiring
harness for exposed wiring water
contamination, corrosion, and proper
assembly.
z
Is a concern present?
Yes
Repair or replace suspected part, Then go to
Step 12.
No
Go to the next step.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:35 AM
Page 98
© 2005 Mitchell Repair Information Company, LLC.
