Engine Controls - Trouble Shooting - With & Without Codes

• Foreword
• Engine OBD II Monitors
  • Notes
  • Catalyst Efficiency Monitor - Federal Test Procedure
  • Comprehensive Component Monitor
  • Evaporative Emission (EVAP) Vapor Management Flow System Monitor
  • Evaporative Emission (EVAP) Running Loss System Monitor
  • Exhaust Gas Recirculation (EGR) System Monitor - Differential Pressure Feedback EGR
  • Fuel System Monitor
  • Heated Oxygen Sensor (HO2S) Monitor
  • Misfire Detection Monitor
  • Malfunction Indicator Lamp (MIL)
• Electronic Engine Control (EEC) System
  • Overview
  • Modifications to OBD II Vehicles
  • Powertrain Control Software
    • Multiplexing
    • Standard Corporate Protocol
    • Flash Electrically Erasable Programmable Read Only Memory
    • Idle Air Trim
    • Fuel Trim
    • Failure Mode Effects Management
    • Engine RPM/Vehicle Speed Limiter
  • Powertrain Control Hardware
    • Generic Electronic Module
    • Keep Alive Random Access Memory (RAM)
    • Hardware Limited Operation Strategy (HLOS)
    • Integrated Electronic Ignition System
  • Power and Ground Signals
    • Vehicle Power
    • Vehicle REFERENCE Voltage
    • Mass Air Flow Return
    • Signal Return
    • Power Ground
    • Gold Plated Pins
  • Fuel Systems
    • Mechanical Returnless Fuel System
  • Exhaust Gas Recirculation Systems
    • Overview
    • Differential Pressure Feedback EGR System
  • Evaporative Emissions System Outline
    • Overview
  • Intake Air Systems
  • Positive Crankcase Ventilation System Overview
  • Catalyst and Exhaust Systems Overview
  • Communication Error
  • Vehicle Check/Preparation
    • Visual Checks
    • Vehicle Preparation
  • Intermittent Diagnostic Techniques
    • Notes
    • Re-creating the Fault
      • Notes
      • Conditions To Re-Create Fault
    • Accumulating PCM Data
    • Analyzing Data From Playback of Stored PIDs
    • Comparing PCM Data
    • Diagnostic Monitoring Test Results
      • Notes
      • Diagnostic Monitoring Test Results Tables
        • Notes
        • Example:
  • On-Board System Readiness
    • Description
  • Freeze Frame Data
    • Description
  • Output Test Mode
    • Description
  • Powertrain Control Module (PCM) Reset
    • Description
    • Resetting Keep Alive Random Access Memory (RAM)
• On-Board Diagnostic Tests - NGS Tester
  • On-Board Diagnostic (OBD) Test Description
    • Notes
    • System Pass
  • Key ON, Engine OFF (KOEO) On-Demand Self-Test
  • Key ON Engine Running (KOER) On-Demand Self-Test
    • Notes
    • Continuous Memory Self-Test
  • Parameter Identification (PID) Access
  • Brake On/Off Test
  • Transmission Control (O/D OFF) Switch Test
  • Power Steering Pressure (PSP) Switch Test
  • On-Board Diagnostic Test - New Generation Star (NGS) Tester Hook-Up Procedure
  • Retrieving DTCs Procedure
  • Retrieve/Clear Continuous DTC Self-Test Procedure
  • Key ON Engine OFF Self-Test Procedure
  • Key ON Engine Running Self-Test Procedure
  • After Repair Procedure
  • PID/DATA Monitor and Record Procedure
  • Playback of Stored PIDs Procedure
  • Output Test Mode Procedure
• On-Board Diagnostic Tests - WDS
  • On-Board Diagnostic (OBD) Test Description
  • System Pass
  • Key ON, Engine OFF (KOEO) On-Demand Self-Test
  • Key ON Engine Running (KOER) On-Demand Self-Test
    • Notes
    • Continuous Memory Self-Test
    • Parameter Identification (PID) Access
    • Brake On/Off Test
    • Transmission Control (O/D OFF) Switch Test
    • Power Steering Pressure (PSP) Switch Test
  • On-Board Diagnostic Test
    • DTCs Reading Procedure
    • Pending Trouble Code Access Procedure
    • Freeze Frame PID Data Access Procedure
    • On-Board System Readiness Tests Access Procedure
    • PID/DATA Monitor and Record Procedure
    • Diagnostic Monitoring Test Results Access Procedure
      • Notes
      • After Repair Procedure [Kl]
• Drive Cycle
  • Description of OBD II Drive Cycle
  • Drive Cycle Recommendations
  • Vehicle Preparation
  • OBD II Drive Cycle
  • Monitor Repair Verification Drive Cycles
    • Comprehensive Component Monitor Repair Verification Drive Cycle
    • EGR Monitor Repair Verification Drive Cycle
    • HO2S Monitor Repair Verification Drive Cycle:
    • Fuel or Misfire Monitor Repair Verification Drive Cycle:
    • EVAP Running Loss System Repair Verification Drive Cycle:
    • Catalyst Monitor Repair Verification Drive Cycle:
• Diagnostic Trouble Code (DTC) Index
• Diagnostic Trouble Code Numbers
• Diagnostic Trouble Code Application Chart
• Pcm Quick Test
• 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 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
• 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 P1128: Heated Oxygen Sensor (Ho2S) Signals
• DTC P1130, 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: Differential Pressure Feedback (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 P0551, P0552, P0553, P1650, P1651: Power Steering Pressure (PSP) Switch Malfunction
• DTC P1780: Transaxle Control Switch (TCS) Or Transaxle Control Indicator Lamp (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 And 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
  • Inspection and Verification
  • Component Tests
    • Engine Oil Leaks
    • Fluorescent Oil Additive Method
  • Compression Test
    • General Remarks
    • Check The Compression Pressure
    • Interpretation of the Results
  • Excessive Engine Oil Consumption
  • Oil Consumption Test
  • Intake Manifold Vacuum Test
    • Notes
    • Interpreting Vacuum Gauge Readings
• Evaporative Emission System
  • Evaporative Emission System
    • Duratec Engine
    • Zetec Engine
  • Principles of Operation
    • Fuel Filler Cap
    • Fuel Vapor Recirculation Tube (Duratec engine only)
    • Fuel Vapor Control Valve (Duratec engine only)
    • Fuel Tank Pressure (FTP) Sensor
    • Evaporative Emission (EVAP) Canister Purge Valve
    • Canister Vent Solenoid
    • Evaporative Emission (EVAP) Check Valve
    • Dust Separator
    • Evaporative Emission (EVAP) Canister
    • Fuel Vapor Vent Valve (FVV) Assembly
    • Fuel Filler Pipe Check Valve
    • Evaporative Emission System Monitor
    • EVAP Running Loss System Leak Test
  • Inspection and Verification
• Evaporative Emission System Leak Test
• Evaporative Emission Repair Verification Drive Cycle
  • Drive Cycle Recommendations
• Canister Vent Solenoid Closing Procedure
• Acceleration Control
  • Notes
  • Inspection and Verification
• Charging System
  • Notes
  • Principles of Operation
    • Notes
    • Functionality (Duratec engine only)
    • Battery Positive Output Circuit (B+) 36 (Y/W)
    • I Circuit (LG/R)
    • A Circuit (B/Y)
  • Inspection and Verification
  • Component Tests
    • Battery - Load Test
    • Battery - Electronic Drains Which Shut Off When the Battery Cable is Disconnected
    • Generator On-Vehicle Tests
    • Generator On-Vehicle Tests - Load Test
    • Generator On-Vehicle Tests - No Load Test
• Battery
  • Inspection and Verification
• Starting System
  • Inspection and Verification
  • Component Tests
    • Starter Motor - Motor Feed Circuit
    • Starter Motor - Ground Circuit Test
• Symptom Troubleshooting Chart - Engine
• Symptom Troubleshooting Chart - Drive Belts
• Symptom Troubleshooting Chart - Engine Cooling System
  • Notes
  • Pinpoint Test 1: Loss Of Coolant
  • Pinpoint Test 2: The Engine Overheats
  • Pinpoint Test 3: The Engine Does Not Reach Normal Operating Temperature
  • Pinpoint Test 4: The Block Heater Does Not Operate Correctly
  • Pinpoint Test 5: Electric Cooling Fan Malfunction
• 2.0L ZETEC Fan Diagnosis Chart
  • Notes
  • Pinpoint Test 1: Loss Of Power
• Symptom Troubleshooting Chart - Fueling
  • Notes
  • Pinpoint Test 1: Hiss When Opening Fuel Cap
  • Pinpoint Test 2: Excessive Fuel Odor
  • Pinpoint Test 3: Unable To Refuel (ORVR)
• Symptom Troubleshooting Chart - Accelerator
• Symptom Troubleshooting Chart - Charging System
  • Notes
  • Pinpoint Test 1: Battery Is Discharged Or Voltage Is Low
  • Pinpoint Test 2: The Charging System Warning Indicator Is On With The Engine Running (The System Voltage Does Not Increase)
  • Pinpoint Test 3: Charging System Warning Indicator Is On With The Engine Running (The System Voltage Does Not Increase) - 2.0L ZETEC
  • Pinpoint Test 4: The System Overcharges (Battery Voltage Is Greater Than 15.5 Volts)
  • Pinpoint Test 5: The System Overcharges (Battery Voltage Greater Than 15.5 Volts) - 2.0L ZETEC
  • Pinpoint Test 6: The Charging System Warning Indicator Is On With The Engine Running And The Battery Increase Voltage
  • Pinpoint Test 7: Charging System Warning Indicator Is On With The Engine Running The System Increases Voltage - 2.0L ZETEC
  • Pinpoint Test 8: The Charging System Warning Indicator Is Off With The Ignition Switch In The Run Position And The Engine Off
  • Pinpoint Test 9: The Charging System Warning Indicator Is Off With The Ignition Switch In The Run Position And The Engine Is Off - 2.0L ZETEC
  • Pinpoint Test 10: The Charging System Warning Indicator Flickers Or Is Intermittent
  • Pinpoint Test 11: The Charging System Warning Indicator Lamp Flickers Or Is Intermittent - 2.0L ZETEC
  • Pinpoint Test 12: The Generator Is Noisy
  • Pinpoint Test 13: Radio Interference
  • Pinpoint Test 14: Battery Condition Test
• Symptom Troubleshooting Chart - Starting System
  • Notes
  • Pinpoint Test 1: The Engine Does Not Crank Or The Relay Clicks
  • Pinpoint Test 2: Unusual Starter Noise
• Symptom Troubleshooting Chart - Cruise Control
  • Notes
  • Pinpoint Test 1: The Speed Control Is Inoperative
  • Pinpoint Test 2: The Set Speed Fluctuates
  • Pinpoint Test 3: The Speed Control Does Not Disengage When The Brakes Are Applied
  • Pinpoint Test 4: The Speed Control Does Not Disengage When The Clutch Is Applied
  • Pinpoint Test 5: The Speed Control Switch Is Inoperative - Coast
  • Pinpoint Test 6: The Speed Control Switch Is Inoperative - Set/ACCL
  • Pinpoint Test 7: The Speed Control Switch Is Inoperative - Resume
  • Pinpoint Test 8: The Speed Control Switch Is Inoperative - Off
  • Pinpoint Test 9: The Speed Control Indicator Lamp Is Always On
• Powertrain Control Module Symptom Troubleshooting Chart
  • Symptom Troubleshooting Chart
• Generic Electronic Module (Gem) Symptom Troubleshooting Chart
  • Notes
  • Pinpoint Test 1: No Module/Network Communication - SCP Link
  • Pinpoint Test 2: Unable To Enter Self - Test
  • Pinpoint Test 3: Generic Electronic Module (Gem) Symptom Troubleshooting
• 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