Engine Controls - DTC P0401 (EGR) Update

VOLUME
3

GROUP
General
Information

NUMBER
011

MODEL
Amanti

DATE
June 2004

SUBJECT
Amanti Exhaust Gas Recirculation (EGR) DTC P0401 Information





This bulletin provides information relating to the EGR system Diagnostic Trouble Code (DTC) P0401, Exhaust Gas Recirculation (EGR) System Malfunction, that was omitted from the FL (Fuel System) group of the Amanti 2004 Service Manual P/N UH040 P5010.

Note:
This information has been updated on KSIS.

DESCRIPTION:





The EGR valve is designed to lower peak combustion temperature and reduce oxides of nitrogen emissions (NOx) by recirculating exhaust gas through the intake manifold and the combustion chambers. It is not operated at idle and during engine warm up.

INSPECTION PROCEDURE:

1. Turn the ignition switch to the OFF position. Inspect the EGR Solenoid Valve and connector terminals for looseness, poor contact, bending, corrosion, contamination, deterioration or damage.

2. Inspect EGR vacuum hoses for leaks, cracks, or kinked hose.

3. Measure the resistance between terminal 1 and 2 on the EGR Solenoid Valve.

Specifications (Resistance): 29.0 35.0 OHMS (at 20 degrees Celsius I 68 degrees Fahrenheit). If resistance is out of specifications, replace the EGR Solenoid Valve. If the EGR Solenoid Valve is good, continue Diagnostic Procedure.

Note:
Resistance may vary; depending on surrounding ambient temperature. If possible, compare readings with a known good solenoid.





SCHEMATIC DIAGRAM (EGR SYSTEM):





DIAGNOSTIC PROCEDURE: