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Filed Under (Nissan) by admin on 31-12-2010
IF YOU CONFIRM: • DTC P0400 (EGR) or P0402 (EGRC-BPT Valve) is stored in the ECM, and/or • The vehicle exhibits rough running or other drivability incidents, and/or • Difficulty in setting the EGR System Readiness Test (SRT) status to CMPLT. ACTION: Clean the intake manifold EGR ports.SERVICE PROCEDURE 1. Remove the throttle chamber assembly and place it aside. • Refer to the EM section of the appropriate Service Manual (ESM). NOTE: It is not necessary to completely remove the throttle chamber assembly. • Only remove harness connectors, cables, and hoses necessary to allow the throttle chamber assembly to be placed aside. • Throttle chamber coolant hoses do not need to be removed. NOTE: Figure 1 gives a general location of the plugs for the EGR ports, but the plugs are not visible in the photo. 2/4 2. Remove the EGR valve mounting bolts and then move the EGR valve outward about ½ inch (see Figure 2). • This is so you can remove the plug for the “rear most” EGR port. NOTE: You don’t need to completely remove the EGR valve. Rear Most EGR Port. EGR Valve EGR Mounting Bolts Move about ½ inch. Figure 2 3. Remove the plugs for the EGR ports (see Figure 3). Figure 3
Filed Under (Nissan) by admin on 31-12-2010
IF YOU CONFIRM The MIL is ON and code P1402 EGR OPEN is stored in the ECM. ACTION • Inspect the EGR valve for metallic debris. See the Service Information section of this bulletin for the specific inspection procedure. • If metallic debris is present, replace the Bank 1 catalyst and EGR valve. SERVICE INFORMATION 1. Remove the EGR valve as per the EM section of the respective ESM. 2. Inspect the EGR valve for metallic flake debris. (see Figures 1 and 2) 3. If metallic debris is present in the EGR valve, remove Bank 1 catalyst (rear of engine) as per EM section of the respective ESM. 4. Inspect both the top and bottom of the catalyst. • Bank 1 Catalyst–viewed from the top. (see Figure 3) 5. If the catalyst has loose material as seen if Figure 3 above, blow out the debris from interior of Bank 1 exhaust manifold. Remove the EGR valve and tube, and then blow out any debris from the EGR valve and tube. 6. Replace the Bank 1 catalyst and EGR valve in the reverse order of removal. 7. Clear stored code P1402 from the ECM memory.
Filed Under (Honda) by admin on 08-06-2010
BACKGROUND In some areas of the U.S., certain basic chemical properties of gasoline (regardless of brand) may cause the intake manifold EGR port to clog or the EGR valve to fail. If this happens, the MIL comes on with a DTC P0401 (insufficient EGR flow) or P1491 (insufficient EGR lift) stored. CORRECTIVE ACTION Clean the EGR port, and install the EGR pipe kit. PARTS INFORMATION EGR Pipe Kit: P/N 06175-P8C-A00, H/C 6912125 REPAIR PROCEDURE 1. Remove the throttle body cover, intake manifold covers, ignition wire holder, and ignition wire cover.
Filed Under (Toyota) by admin on 30-04-2010
EMISSION SYSTEMS & SUB-SYSTEMS EXHAUST GAS RECIRCULATION (EGR) SYSTEM TEST NOTE: EGR systems contain different components depending on application. See Fig. 19 . When testing EGR system and components, use proper illustration determine component location. NOTE: When performing EGR system test, it may be necessary to monitor engine by using scan tool. For scan tool connections, see IDLE SPEED & MIXTURE in ADJUSTMENTS 1. Ensure EGR vacuum modulator filter is clean and in good condition. Clean filter with compressed air (if necessary). NOTE:
EGR vacuum modulator filter must be installed with coarse side facing
upward, away from EGR vacuum modulator.
Filed Under (Dodge) by admin on 18-06-2010
SYMPTOM/CONDITION The vehicle operator may experience a MIL illumination. Further diagnosis may determine that the MIL was caused by one or more of the following DTC’s: P0401-EGR SYSTEM PERFORMANCE P0403-EGR CONTROL CIRCUIT P0404-EGR POSITION SENSOR PERFORMANCE P0405-EGR POSITION SENSOR LOW P0406-EGR POSITION SENSOR HIGH DIAGNOSIS Using a Scan Tool (DRBIII(R) or StarSCAN(tm)) with TechCONNECT or the appropriate Diagnostic Procedures Manual, verify all engine systems are functioning as designed. If DTC’s are present, other than those listed, record them on the repair order and repair as necessary before proceeding further with this bulletin. If the vehicle operator describes or the technician experiences the Symptom/Condition, perform the Repair Procedure.