Chrysler 300M 2002 Service Manual page 2578

Symptom:
P0401 - EGR SYSTEM PERFORMANCE
When Monitored and Set Condition:
P0401 - EGR SYSTEM PERFORMANCE
When Monitored: During engine decel, 26 to 4 MPH. Engine Coolant greater than 70°C
(158°F). Engine run time greater than 120 seconds.
Set Condition: The PCM monitor engine roughness. During decel the EGR is opened and
PCM monitor engine then monitor engine rough with the valve open. If an increase of
engine roughness is not present an error is detected. Two Trip Fault.
INTERMITTENT CONDITION
EGR VALVE OPEN AT IDLE
EGR VALVE ASSEMBLY INSPECTION
EGR SOLENOID ASSEMBLY
EGR SOLENOID GROUND CIRCUIT OPEN
EGR SOLENOID CONTROL CKT SHORT TO GND
EGR SOLENOID CONTROL CKT SHORTED TO VOLTAGE
EGR SOLENOID CONTROL CKT OPEN
PCM - EGR OPEN
PCM - EGR CLOSED
TEST
1 Turn the ignition on.
With the DRBIII , read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter displayed and equal to zero?
Yes → Go To 2
→ Go To 12
No
2 Note: If the vehicle is running rough at idle (DRB not actuated) follow the
yes path to continue.
Turn the ignition on.
Turn all accessories off.
Start the engine.
Allow the engine to reach normal operating temperature.
With the DRB, enter Engine System Test, then EGR System Test.
Actuate the FLOW function in the EGR System Test.
Did the engine run rough or stall?
Yes → Go To 3
→ Go To 7
No
POSSIBLE CAUSES
ACTION
149
DRIVEABILITY - NGC
APPLICABILITY
All
All