Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSSUZUKI2005GRAND VITARA EX, 4WDREPAIR AND DIAGNOSISENGINE PERFORMANCEENGINE CONTROL SYSTEMSENGINE GENERAL INFORMATION AND DIAGNOSIS
2005 Suzuki Grand Vitara EX, 4WD
Engine General Information And Diagnosis
2005 Suzuki Grand Vitara EX, 4WDSECTION Engine General Information And Diagnosis
- H25 Engine
- Precautions
- General Description
- Schematic and Routing Diagram
- Diagnostic Information and Procedures
- Engine and Emission Control System Check
- Notes
- Description for Each Step
- Step 1: Customer complaint analysis
- Step 2: DTC / freeze frame data check
- Step 3 and 4: Visual inspection
- Step 5: Trouble symptom confirmation
- Step 6 and 7: DTC / freeze frame data check
- Step 8: Engine basic inspection
- Step 9: DTC troubleshooting
- Step 10: Intermittent problems check
- Step 11: Final confirmation test
- Visual Inspection
- Engine Basic Check
- Malfunction Indicator Lamp (MIL) Check
- DTC Table
- DTC Check
- DTC Clearance
- Fail-Safe Table
- Scan Tool Data
- Engine Symptom Diagnosis
- MIL Does Not Light or MIL Dims at Ignition Switch ON Leaving Engine OFF but Engine Can Be Starting
- MIL Remains ON after Engine Starts
- MIL Does Not Light at Ignition Switch ON and Engine Does Not Start though It Is Cranked Up
- DTC P0101: Mass Air Flow (MAF) Sensor Performance Problem
- DTC P0102: Mass Air Flow (MAF) Sensor Circuit Low Voltage
- DTC P0103: Mass Air Flow (MAF) Sensor Circuit High Voltage
- DTC P0107 / P0108: Manifold Absolute Pressure Sensor Circuit Low / High Input
- DTC P0111: Intake Air Temperature (IAT) Sensor Circuit Range / Performance Problem
- DTC P0112: Intake Air Temperature (IAT) Sensor Circuit Low Input
- DTC P0113: Intake Air Temperature (IAT) Sensor Circuit High Input
- DTC P0116: Engine Coolant Temperature (ECT) Sensor Performance
- DTC P0117: Engine Coolant Temperature (ECT) Sensor Circuit Low Input
- DTC P0118: Engine Coolant Temperature (ECT) Sensor Circuit Input
- DTC P0121: Throttle Position (TP) Sensor Circuit Performance Problem
- DTC P0122: Throttle Position (TP) Sensor Circuit Low Input
- DTC P0123: Throttle Position (TP) Sensor Circuit High Input
- DTC P0125: Insufficient Coolant Temperature for Closed Loop Fuel Control
- DTC P0128: Coolant Thermostat (Coolant Temp, below Thermostat Regulating Temp.)
- DTC P0131: H02S (Bank-1 Sensor-1) Circuit Low Voltage
- DTC P0132: H02S (Bank-1 Sensor-1) Circuit High Voltage
- DTC P0133: H02S (Bank-1 Sensor-1) Circuit Slow Response
- DTC P0134: H02S (Bank-1 Sensor-1) No Activity Detected
- DTC P0135: H02S (Bank-1 Sensor-1) Heater Circuit Malfunction
- DTC P0137 / P0138: H02S (Bank-1 Sensor-2) Circuit Low / High Voltage
- DTC P0141: H02S (Bank-1 Sensor-2) Heater Circuit Malfunction
- DTC P0151: HO2S (Bank-2 Sensor-1) Circuit Low Voltage
- DTC P0152: HO2S (Bank-2 Sensor-1) Circuit High Voltage
- DTC P0153: HO2S (Bank-2 Sensor-1) Circuit Slow Response
- DTC P0154: HO2S (Bank-2 Sensor-1) No Activity Detected
- DTC P0155: HO2S (Bank-2 Sensor-1) Heater Circuit Malfunction
- DTC P0157 / P0158: HO2S (Bank-2 Sensor-2) Circuit Low / High Voltage
- DTC P0161: HO2S (Bank-2 Sensor-2) Heater Circuit Malfunction
- DTC P0171 / P0172: Fuel System Too Lean / Rich (Bank-1)
- DTC P0174 / P0175: Fuel System Too Lean / Rich (Bank-2)
- DTC P0300 / P0301 / P0302 / P0303 / P0304 / P0305 / P0306: Misfire Detected
- DTC P0335: Crankshaft Position (CKP) Sensor Circuit Malfunction
- DTC P0340: Camshaft Position (CMP) Sensor Circuit Malfunction
- DTC P0401 / P0402: Exhaust Gas Recirculation (EGR) Flow Insufficient Detected / Excessive Detected
- DTC P0403: Exhaust Gas Recirculation (EGR) Control Circuit
- DTC P0420 / P0430: Catalyst System (Bank-1 / -2) Efficiency below Threshold
- DTC P0442 / P0455: Evaporative Emission Control System Leak Detected (Small Leak) / (Gross Leak)
- DTC P0444 / P0496: Evaporative Emission Control System Purge Control Valve Circuit Open / EVAP System Flow during Non-Purge
- DTC P0445: Evaporative Emission Control System Purge Control Valve Circuit Shorted
- DTC P0447: Evaporative Emission Control System Vent Control Circuit Open
- DTC P0448: Evaporative Emission Control System Vent Control Circuit Shorted
- DTC P0451: Evaporative Emission Control System Pressure Sensor Performance
- DTC P0452 / P0453: Evaporative Emission Control System Pressure Sensor Low/ High Input
- DTC P0456: Evaporative Emission System Leak Detected (Very Small Leak)
- DTC P0461: Fuel Level Sensor Circuit Performance
- DTC P0463: Fuel Level Sensor Circuit High Input
- DTC P0464: Fuel Level Sensor Circuit Intermittent
- DTC P0500: Vehicle Speed Sensor (VSS) Malfunction
- DTC P0505 / P0506 / P0507: Idle Control System / RPM Lower than Expected / RPM Higher than Expected
- DTC P0601: Internal Control Module Memory Check Sum Error
- DTC P0616 / P0617: Starter Relay Circuit Low / High
- DTC P0630: VIN Not Programmed or Incompatible - ECM/PCM
- DTC P1107 / P1108: Manifold Absolute Pressure Sensor Circuit Performance Problem (Low/ High)
- DTC P1510: ECM (PCM) Back-Up Power Supply Malfunction
- DTC P2025: Evaporative Emissions Fuel Vapor Temperature Sensor Performance
- DTC P2026 / P2027: Evaporative Emission Fuel Vapor Temperature Sensor Circuit Low Voltage / High Voltage
- DTC P2227 / P2228 / P2229: Barometric Pressure Circuit Performance Problem / Low / High
- DTC P2282: Air Leak between Throttle Body and Intake Valves
- Inspection of ECM (PCM) and Its Circuits
- Fuel Pump Circuit Check
- Fuel Injector Circuit Check
- Fuel Pressure Check
- Idle Speed / Idle Air Control (IAC) Duty Inspection
- A/C Signal Circuit Check
- A/C Condenser Fan Motor Relay Control System Check
- A/C Compressor Relay Control System Check
- Engine and Emission Control System Check
- Special Tools and Equipment
- H27 Engine
- Precautions
- General Description
- Schematic and Routing Diagram
- Diagnostic Information and Procedures
- Engine and Emission Control System Check
- Notes
- Description for Each Step
- Step 1. Customer complaint analysis
- Step 2. DTCs / freeze frame data check
- Step 3. Visual inspection
- Step 4. Visual inspection
- Step 5. Trouble symptom confirmation
- Step 6. DTC / freeze frame data recheck
- Step 7. DTC/freeze frame data recheck
- Step 8. Engine basic inspection
- Step 9. DTC troubleshooting
- Step 10. Intermittent problems check
- Step 11. Final confirmation test
- Visual Inspection
- Engine Basic Check
- Malfunction Indicator Lamp (MIL) Check
- DTC Check
- DTC Table
- For A/T System (Only OBD-II Generic Scan Tool Is Displayed on the Following DTC(s) at the Same Time)
- DTC Clearance
- Fail-Safe Table
- Scan Tool Data
- Scan Tool Data Definitions
- Engine Symptom Diagnosis
- MIL Does Not Light or MIL Dims at Ignition Switch ON Leaving Engine OFF (But Engine Can be Starting)
- MIL Remains ON after Engine Starts
- MIL Dose Not Light at Ignition Switch ON and Engine Dose Not Start Through It Is Cranked Up
- DTC P0031 / P0032: HO2S (Bank 1 Sensor-1) Heater Control Circuit Low/ High
- DTC P0037 / P0038: HO2S (Bank 1 Sensor-2) Heater Control Circuit Low / High
- DTC P0051 / P0052: HO2S (Bank 2 Sensor-1) Heater Control Circuit Low / High
- DTC P0057 / P0058: HO2S (Bank 2 Sensor-2) Heater Control Circuit Low / High
- DTC P0101: Mass Air Flow Circuit Performance
- DTC P0102: Mass Air Flow Circuit Low Input
- DTC P0103: Mass Air Flow Circuit High Input
- DTC P0107 / P0108: Manifold Absolute Pressure Circuit Low Input / High Input
- DTC P0111: Intake Air Temperature Sensor Circuit Performance
- DTC P0112: Intake Air Temperature Sensor Circuit Low
- DTC P0113: Intake Air Temperature Sensor Circuit High
- DTC P0116: Engine Coolant Temperature Circuit Performance
- DTC P0117: Engine Coolant Temperature Circuit Low
- DTC P0118: Engine Coolant Temperature Circuit High
- DTC P0121: Throttle Position Sensor Circuit Performance
- DTC P0122: Throttle Position Sensor Circuit Low
- DTC P0123: Throttle Position Sensor Circuit High
- DTC P0125: Insufficient Coolant Temperature for Closed Loop Fuel Control
- DTC P0128: Coolant Thermostat (Coolant Temperature below Thermostat Regulating Temperature)
- DTC P0131 / P0132 / P1131 / P1132: 02 Sensor (Bank 1 Sensor -1) Circuit Low Voltage Shift / High Voltage Shift / Circuit Continuity / Circuit High Voltage
- DTC P0133: 02 Sensor (Bank 1 Sensor-1) Circuit Slow Response
- DTC P0134: 02 Sensor (Bank 1 Sensor-1) No Activity Detected
- DTC P0137: 02 Sensor (Bank 1 Sensor-2) Circuit Low Voltage
- DTC P0138 / P0140: 02 Sensor (Bank 1 Sensor-2) Circuit High Voltage / No Activity Detected
- DTC P0151 / P0152 / P1151 / P1152: 02 Sensor (Bank 2 Sensor-1) Circuit Low Voltage Shift / High Voltage Shift / Circuit Continuity / Circuit High Voltage
- DTC P0153: 02 Sensor (Bank 2 Sensor-1) Circuit Slow Response
- DTC P0154: 02 Sensor (Bank 2 Sensor-1) No Activity Detected
- DTC P0157: 02 Sensor (Bank 2 Sensor-2) Circuit Low Voltage
- DTC P0158 / P0160: 02 Sensor (Bank 2 Sensor-2) Circuit High Voltage / No Activity Detected
- DTC P0171 / P0174: System Too Lean
- DTC P0172 / P0175: System Too Rich
- DTC P0300 / P0301 / P0302 / P0303 / P0304 / P0305 / P0306: Misfire Detected
- DTC P0327 / P0328: Knock Sensor Circuit Low / High
- DTC P0335: Crankshaft Position Sensor Circuit
- DTC P0340: Camshaft Position Sensor Circuit
- DTC P0401 / P0402: Exhaust Gas Recirculation Flow Insufficient Detected / Excessive Detected
- DTC P0403: Exhaust Gas Recirculation Control Circuit
- DTC P0420: Catalyst System Efficiency below Threshold (Bank 1)
- DTC P0430: Catalyst System Efficiency below Threshold (Bank 2)
- DTC P0441: Evaporative Emission System Incorrect Purge Flow
- DTC P0443: Evaporative Emission System Purge Control Valve Circuit
- DTC P0449: Evaporative Emission System Vent Valve / Solenoid Circuit
- DTC P0456: Evaporative Emission System Leak Detected
- DTC P0461: Fuel Level Sensor Circuit Performance
- DTC P0463: Fuel Level Sensor Circuit High
- DTC P0500: Vehicle Speed Sensor
- DTC P0506 / P0507: Idle Air Control System RPM Lower than Expected / Higher than Expected
- DTC P0601 / P0602 / P0607: Internal Control Module Memory Check Sum Error / Control Module Programming Error / Control Module Performance
- DTC P0616: Starter Relay Circuit Low
- DTC P0617: Starter Relay Circuit High
- DTC P0630: VIN Not Programmed or Incompatible-ECM/PCM
- DTC P0660: Intake Manifold Tuning Valve Control Circuit / Open
- DTC P1107 / P1108: Manifold Absolute Pressure Circuit Performance Low / High
- DTC P1420/P1421: Evaporative Emission System Vent Valve Stuck Open/Closed
- DTC P1422: Evaporative Emission System Leak Detect Pump Stuck OFF
- DTC P1424/P1425: Evaporative Emission System Leak Detecting Pump Flow High/Low System Diagram
- DTC P1510: ECM Back-Up Power Circuit Low
- DTC P1601: CAN Communication Error
- DTC P1603: TCM Trouble Code Detected
- DTC P2227: Barometric Pressure Circuit Performance
- DTC P2228/P2229: Barometric Pressure Circuit Low/High
- DTC P2400: Evaporative Emission System Leak Detection Pump Control Circuit / Open
- Inspection of ECM and Its Circuits
- Fuel Pump Circuit Inspection
- Fuel Injector Circuit Inspection
- Fuel Pressure Control System Inspection
- Idle Air Control (IAC) System Inspection
- Idle Speed / Idle Air Control (IAC) Duty Inspection
- A/C Signal Circuit Check
- A/C Condenser Fan Motor Relay Low Speed Control System Check
- A/C Condenser Fan Motor Relay High-Speed Control System Check
- A/C Compressor Relay Control System Check
- Engine and Emission Control System Check
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.