DTC P050E [MZI-3.7]
DTC P050E (MZI-3.7) DETECTION CONDITIONS AND POSSIBLE CAUSES
4
z
Remove air cleaner element with the
engine running.
z
Is the engine speed increased?
Yes 7.
No
Go to the next step.
5
INSPECT INTAKE AIR SYSTEM FOR
EXCESSIVE AIR SUCTION
z
Visually inspect the hose in intake air
system for looseness or damages.
z
Is there any malfunction?
Yes Repair or replace the malfunctioning part, then
go to Step 7.
No
Go to the next step.
6
INSPECT THROTTLE BODY
PASSAGE
z
Is the throttle body clogged?
Yes
Clean or replace the throttle body passage, then
go to Step 7.
No
Go to the next step.
7
VERIFY TROUBLESHOOTING OF
DTC P0507 HAS BEEN COMPLETED
z
Verify that all disconnected
connectors reconnected.
z
Start the engine.
z
Clear the DTC from the PCM memory
using the M-MDS.
z
Depress brake pedal for
14 s or more.
z
Is PENDING CODE for this DTC
present?
Yes
Replace the PCM, then go to the next step. (See
PCM REMOVAL/INSTALLATION [MZI-
3.7]
.)
No
Go to the next step.
8
VERIFY AFTER REPAIR
PROCEDURE
z
Perform the "AFTER REPAIR
PROCEDURE". (See
AFTER
REPAIR PROCEDURE [MZI-3.7]
.)
z
Are any DTC present?
Yes Go to the applicable DTC inspection. (See
DTC
TABLE [MZI-3.7]
.)
No
Troubleshooting completed.
DTC P050E
Cold start engine exhaust temperature out of range
DETECTION
CONDITION
z
The PCM calculates the actual catalyst warm up temperature during a cold start.
The PCM then compares the actual temperature to the expected catalyst
temperature model. The difference between the actual and expected temperatures
is a ratio. When this ratio exceeds the calibrated value this DTC is set and the
malfunction indicator lamp (MIL) illuminates.
z
Intake air restriction
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:38 AM
Page 245
© 2005 Mitchell Repair Information Company, LLC.
