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Symptom Troubleshooting (Engine/Fuel Control) Expand All (for easy ctrl-f) Collapse All Foreword Engine OBD II Monitors Electronic Engine Control (EEC) System On-Board Diagnostic Tests - NGS Tester On-Board Diagnostic Tests - WDS Drive Cycle Diagnostic Trouble Code Index Diagnostic Trouble Code Numbers Diagnostic Trouble Code Application Chart Pcm Quick Test DTC P0100, P0102, P0103, P1100, P1101, P1102, P1103, P1793: Mass Air Flow (MAF/IAT) Sensor DTC P0110, P0111, P0112, P0113, P0115, P0117, P0118, P0125, P0128, P0298, P1110, P1112, P1113, P1116, P1117, P1285, P1288, P1289, P1290, P1299, P1798: IAT & ECT /CHT Sensors DTC P0120, P0121, P0122, P0123, P0510, P1120, P1121, P1122, P1123, P1124, P1125, P1126, P1771, P1772, P1791: TP Sensor Circuit Malfunction P0031, P0130, P0131, P0150, P0151: Heated Oxygen Sensor (Ho2S) DTC P0038, P0044, P0132, P0133, P0138, P0144, P0152, P0153, P0154: Upstream Heated Oxygen Sensor (Ho2S) DTC P0032, P0051, P0052, P0057, P0058, P0134, P0135, P0141, P0155, P0161, P1135, P1136, P1141, P1142, P1153, P1154, P1169, P1170: Ho2S Heater Circuit DTC P0037, P0043, P0136, P0140, P0142, P0146, P0147, P0156, P0157, P0158, P0160, P1133, P1134, P1137, P1138, P1143, P1144, P1157, P1158, P2270, P02271, P2272, P2273: Ho2S DTC P0170, P0171, P0173, P0174: Adaptive Fuel Control DTC P0172, P0175: Adaptive Fuel Control DTC P0201, P0202, P0203, P0204, P0205, P0206: Fuel Injector Malfunction DTC P0230, P0231, P0232, P1645: Fuel Pump (FP) Primary Or Secondary Circuit DTC P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0315, P0316: Misfire Detection Monitor DTC P0320, P0335, P0336: Crankshaft Position (CKP) Sensor Malfunction DTC P0325, P0326, P0327, P0328, P0330: Knock Sensor Malfunction DTC P0340, P0341, P1336, P1345, P1382, P1387: Camshaft Position Sensor (CMP) Malfunction DTC P0350, P1364: Ignition Coil Primary Circuit Malfunction DTC P0651, P0352, P0353, P0354, P0355, P0356: Integrated Ignition Coil 1, 2, 3, 4, 5, Or 6 Failure DTC P0400, P0401, P0404, P0408: EGR System Malfunction DTC P0402: EGR System Malfunction DTC P0420, P0421, P0430, P0431: Catalyst Efficiency Monitor Malfunction DTC P0442, P0456: Evaporative Emission (EVAP) Monitor And System Malfunction DTC P0440, P0441, P0443, P0444, P0445, P0446: EVAP Canister Purge Solenoid Malfunction DTC P0451, P0461: EVAP System Malfunction DTC P0450, P0452: Fuel Tank Pressure (Ftp) Sensor Malfunction DTC P0453: Fuel Tank Pressure (Ftp) Sensor Malfunction DTC P0455, P1439,P1443, P1446, P1449, P1455, P14556, P1457: EVAP System Malfunction DTC P0457: Evaporative Emission (EVAP) System Malfunction DTC P0505, P0506, P0507, P1251, P1504, P1505, P1507, P1508, P1509, P1510, P1511, P1525, P1526, P1527, P1528, P1540, P1652: IAC Valve Assembly Malfunction DTC P0605, P0606, P0614, P1562, P1600, P1601, P1602, P1603, P1604, P1605, P1608, P1609, P1621, P1622, P1623, P1633, P1639: Pcm Malfunction DTC P0571, P0703, P1572, P1703: Brake Pedal Position (BPP) Switch Malfunction DTC P0704, P1708, P1709, P1797: Clutch Pedal Position (CPP) Switch Malfunction DTC P1000: OBD II Drive Cycle Malfunction DTC P1001: Data Link Connector Malfunction DTC P1127: Ho2S Heater(S) DTC 1128: Heated Oxygen Sensor (Ho2S) Signals DTC 1130, P1150, P1173: Fuel System Not Switching At Fuel Trim (Rich Or Lean) DTC P1131, P1151, P2195, P2196, P1697, P2198: Upstream Heated Oxygen Sensor (Ho2S) Not Switching DTC P1132, P1152: Upstream Heated Oxygen Sensor (Ho2S) Not Switching DTC P0622, P1246, P1630, P1631, P1634: Generator/Regulator System Malfunction DTC P1260: Anti-Theft System DTC P1270: Engine Rpm/Vehicle Speed Limiter DTC P1309: Misfire Detection Monitor Disabled DTC P1400, P1401, P1402, P1407, P1485, P1486, P1487, P1496, P1497, P1498, P1499: DPFEGR Sensor Malfunction DTC P0405, P0406, P1405, P1406: DPFEGR Sensor Malfunction DTC P0403, P1409, P1412: EGR Vacuum Regulator (EGRVR) Solenoid Circuit Malfunction DTC P1450: Evaporative Emission (EVAP) Monitor & System DTC P1451: Canister Vent (CV) Solenoid Malfunction DTC P0645, P1460: A/C Clutch Relay (ACCR) Malfunction DTC P1464, P1465: A/C Control Signal (ACCS) Malfunction DTC P1461, P1462, P1463: A/C Pressure Sensor (ACP) Malfunction DTC P0481, P1473-P1477, P1479, P1480, P1481: Cooling Fan Malfunction DTC P1506: Idle Air Control (IAC) System Malfunction DTC 0551, P0552, P0553, P1650, P1651: Power Steering Pressure (PSP) Switch Malfunction DTC P1780: TCS Or TCIL Circuit Malfunction Diagnostic Index Starting Concerns Hard Start/Long Crank/Erratic Start/Erratic Crank Cranks Normal But Will Not Start Unique Idle Concern Fast Idle Low Idle/Stalls During Deceleration Engine Poor DRIVEABILITY Backfires Lack/Loss Of Power Knocking/Pinging Poor Fuel Economy Emission Compliance Mil/TCIL Never On & Mil/TCIL Always On Exhaust System Concerns Fuel Odor In Engine Compartment Engine Noise Exhaust Sulfur Smell All Supported On Board System Readiness Tests Not Completed Fuel Pump Always On Engine Inspection Engine Evaporative Emission System Evaporative Emission System Leak Test Evaporative Emission Repair Verification Drive Cycle Canister Vent Solenoid Closing Procedure Acceleration Control Charging System Battery Starting System Symptom Troubleshooting Chart - Engine Symptom Troubleshooting Chart - Drive Belts Symptom Troubleshooting Chart - Engine Cooling System 2.0L ZETEC Fan Diagnosis Chart Symptom Troubleshooting Chart - Fueling Symptom Troubleshooting Chart - Accelerator Symptom Troubleshooting Chart - Charging System Symptom Troubleshooting Chart - Starting System Symptom Troubleshooting Chart - Cruise Control Powertrain Control Module Symptom Troubleshooting Chart Generic Electronic Module (Gem) Symptom Troubleshooting Chart General Test Index Test 1: Vehicle Reference Voltage (VREF) Test 2: Malfunction Indicator Lamp (Mil) Test 3: Intermittent Test 4: Fuel Delivery System Test 5: Positive Crankcase Ventilation (PCV) System Test 6: Pcm Power Relay Test 7: Fuel Pressure Regulator Test 8: Fuel Pump Inspection Test 9: Fuel Line/Fuel Pressure Hold Inspection Test 10: Fuel Injector Inspection Test 11: EGR Valve Test 12: EGR Vacuum Regulator (EGRVR) Solenoid Inspection Test 13: Differential Pressure Feedback EGR (DPFE) Sensor Test 14: No Start Test 15: Ignition Scope Test