Protege DX L4-2.0L DOHC (2002)
EGR Valve: All Technical Service Bulletins
Emissions - Rough Idle/MIL ON/DTC's P0300/P0401
TSB: 01-028/05
2001-2003 PROTEGE - EGR CONTROL VALVE STUCK (DTCS P0300, P0401)
APPLICABLE MODEL(S)/VINS
2001-2003 Protege (2.0 Liter Engine)
DESCRIPTION
Some vehicles may experience a rough engine idle when stopping at a traffic light and/or MIL illumination. Diagnosis shows that DTC P0300 and/or
P0401 are stored in memory when the EGR control valve gets stuck in an open position.
This concern may be caused by Moisture entering the body of the EGR valve causes rust to form on the valve shaft. The rust formation on the shaft
causes the valve to stick open intermittently. As a result, too much EGR gas is emitted from EGR control valve and the random misfire occurs.
Customers having this concern should have their vehicle repaired using the following repair procedure.
REPAIR PROCEDURE
1. Inspect the function of the EGR control valve using the WDS, referring to the following inspection procedure.
- If the EGR control valve does not work normally, replace it with a modified one and also replace the gasket with a new one at the same time.
NOTE: The gasket cannot be reused, be sure to replace the gasket with a new one during this repair.
INSPECTION PROCEDURE
1. Connect the WDS to the vehicle.
2. ID the vehicle in the normal manner.
3. Select the "TOOL BOX" and "Datalogger" and press tick.
4. Select the "Module" and "PCM" and press tick.
5. The following screen will display.
NOTE: Erase all of the automatically populated PIDS before starting this testing procedure.
