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REMOVAL NOTE: The oil pump and valve body are removed as an assembly. 1. Disconnect battery ground cable, then remove battery, battery tray, and remote air cleaner. 2. Position supply hoses, vacuum hoses, and wiring away from pump and valve body cover. 3. Remove shift lever. 4. On models equipped with Anti-lock Brake System (ABS) , remove splash shield cover, then disconnect brake reservoir hose and cap to prevent contamination. 5. On all models, remove EGR bracket attaching bolts, then install lifting eye. 6. Remove throttle body bracket attaching bolt, install lifting eye, then using suitable equipment support engine. 7. Remove lefthand transaxle mount. 8. Remove transaxle side pan upper attaching bolts. 9. Raise and support vehicle. 10. Remove lefthand front wheel and tire assembly. 11. Remove inner fender cover and position aside, then disconnect ride height sensor. 12. Remove rear transaxle mount attaching bolt. 13. Loosen but do not remove two lefthand subframe attaching bolts. 14. Remove two engine support mount attaching bolts. 15. Remove four lefthand engine support attaching bolts, then remove the engine support. 16. Position suitable drain pan, then remove remaining transaxle side pan attaching bolts and remove pan. 17. Using suitable screwdriver, place manual shift shaft in Park position. 18. Disconnect upper bulkhead electrical connector wiring retainer clip from valve body. 19. Disconnect electrical connectors. Oil Pump And Valve Body Bolt Removal 20. Remove valve body attaching bolts, then disengage linkage and remove valve body. NOTE: Do not remove oil pump cover attaching bolts. INSTALLATION 1. Install new pump and valve body to chain cover gasket. 2. Slide pump and valve body onto pump shaft. 3. Rotate pump and valve body assembly toward dash panel, then engage manual valve link with manual valve. 4. Slightly rotate pump and valve body assembly to engage oil pump shaft splines with oil pump rotor splines. Valve body should slide flush with chain cover. A suitable 7/8 inch deep well socket on crankshaft pulley may be required for complete engagement. 5. On models less anti-skid, if engagement is not as indicated in step 4, proceed as follows: a. Remove manual valve from valve body. b. Rotate assembly to allow full engagement, up to 360° . c. After full engagement, return assembly to installed position, then install manual valve.

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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.

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1. Rotate crankshaft (6303) to zero degrees top dead center (TDC) on the compression stroke. 2. Disconnect battery ground cable (14301). 3. Drain engine cooling system. Refer to Section 03-03. 4. Remove air cleaner outlet tube (9B659) to throttle body (9E926) . Refer to Section 03-12. 5. Mark and remove vacuum lines to upper intake manifold (9424). 6. Disconnect EGR backpressure transducer hose from EGR valve to exhaust manifold tube (9D477) , loosen lower EGR valve to exhaust manifold tube nut and rotate EGR valve to exhaust manifold tube away from EGR valve (EGR valve) (9D475) . 7. Disconnect the throttle position sensor (TP sensor) (9B989), idle air control valve (IAC valve) (9F715) , EGR backpressure transducer and EGR vacuum regulator solenoid electrical connectors. 8. WARNING: COVER FUEL PRESSURE RELIEF VALVE (9H321) WITH SHOP CLOTH TO PREVENT ACCIDENTAL FUEL SPRAY INTO EYES. Relieve pressure at the fuel pressure relief valve . Refer to Section 03-04A. 9. Remove fuel tube safety clips. 10. CAUTION: Cover fuel tube ends with clean shop cloths to prevent dirt from entering opening. Disconnect fuel tubes (9291). Refer to Section 10-01. 11. Remove upper intake manifold as described. Discard old intake manifold upper gasket (9H486) . 12. Disconnect engine control sensor wiring retainers from rocker arm cover stud bolts and each fuel injector, and position the engine control sensor wiring (12A581) out of the way. 13. NOTE: Fuel injectors and fuel injection supply manifold (9F792) may be removed with lower intake manifold as an assembly. Remove fuel injection supply manifold and fuel injector. 14. Remove ignition wires from spark plugs (12405) . Refer to Section 03-07A. Remove wire harness retainers from valve cover retaining stud bolts. 15. Remove ignition coil (12029) and bracket from LH front cylinder head (6049) and set aside. Refer to Section 03-07A. 16. Disconnect upper radiator hose (8260) and heater water hoses (18472) . 17. Remove camshaft position sensor (CMP sensor) (6B288) and housing. Refer to Section 03-14. 18. Disconnect engine control sensor wiring from engine coolant temperature sensor (ECT sensor) (12A648) and the water temperature indicator sender unit (10884) . 19. If LH (front) cylinder head is being removed, perform the following: Disconnect generator electrical connectors. Remove drive belt (8620). Refer to Section 03-05. Remove drive belt tensioner (6B209). Refer to Section 03-05. Remove generator brace and generator (GEN) (10346). Remove power steering support bracket and power steering pump (3A674) as an assembly and set aside in a position to prevent fluid from leaking out. Remove oil level indicator tube retaining nut from exhaust manifold stud bolt. Rotate or remove oil level indicator tube (6754) from exhaust manifold (9430) . 20. If RH (rear) cylinder head is being removed, perform the following:

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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

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Reset the PCM . 2. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on. 3. Drive the vehicle under load for about 10 minutes . Try to keep the engine speed in the 1,700 – 2,500 rpm range. 4. Check the Temporary DTC with the scan tool. Is Temporary DTC P1491 indicated? YES – Go to step 5. NO – Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the EGR valve and at the PCM. 5. Turn the ignition switch OFF . 6. Disconnect the EGR valve 6P connector. 7. Start the engine and let it idle. 8. Measure voltage between EGR valve 6P connector terminals No. 4 and No. 6. Is there about 9 – 10 V ? YES – Go to step 9. NO – Substitute a known-good PCM, and recheck. If the symptom/indication goes away, replace the original PCM. 9. Turn the ignition switch OFF . 10. Turn the ignition switch ON (II). 11. Measure voltage between EGR valve 8P connector terminals No. 2 and No. 3. Is there about 5 V ? YES – Go to step 13. NO – Go to step 12. 12. Measure voltage between PCM connector terminals C18 and C28. Is there about 5 V? YES – Repair open in the wire between the EGR valve and the PCM (C18, C28). NO – Substitute a known-good PCM and recheck. If the symptom/indication goes away, replace the original PCM. 13. Turn the ignition switch OFF .