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Before using this section, be sure that you have:1. Gathered information about the complaint to adequately describe the symptoms.2. Verified that the complaint is not due to normal engine operation.3. Repaired all ACTIVE Diagnostic Codes.Then, Identify probable causes using the procedure in this section which best describes the symptoms. The narrow the probable causes using:What happened, and when?Under what conditions?What else occurred?When did the symptoms begin (and what else happened at that time)?Do they correlate to probable causes?Did they occur at the same time as the symptoms?Are some logged repeatedly?Are they related to this symptom?Do they have common probable causes?Finally, test each probable cause using the tests suggested by the procedure. Be sure to check connectors, especially on intermittent problems!P-301: Engine Will Not Crank
P-302: Engine Cranks But Will Not Start
P-303: Engine Misfires, Runs Rough Or Is Unstable
P-304: Low Power/Poor Or No Response To Throttle
P-305: Cruise Or PTO Does Not Function
P-310: Intermittent Engine Shutdowns
P-311: Intermittent Low Power Or Power Cutouts
P-312: Intermittent Cruise Or PTO Drop-Out
P-320: ECAP/DDT Will Not Communicate With 3176 System
P-321: ECM Will Not Accept Factory Passwords
P-322: Diagnostic/Warning Lamp Is Malfunctioning