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.
2004 Saturn Ion 1 AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls Component Views
| Callout | Component Name |
|---|---|
| 1 | Fuel Injectors Rail |
| 2 | Throttle Body |
| 3 | Manifold Absolute Pressure (MAP) Sensor |
| 4 | Ignition Control (IC) Module |
| 5 | Evaporative Emissions (EVAP) Canister Purge Solenoid Valve |
| 6 | G105 (2.0L Similar) |
| 7 | Crankshaft Position (CKP) Sensor |
| 8 | Knock Sensor (KS) |
| 9 | C150 |
| Callout | Component Name |
|---|---|
| 1 | Backup Lamp Switch (M86) |
| 2 | Engine Coolant Temperature Sensor (ECT) |
| 3 | Heated Oxygen Sensor (HO2S)1 |
| 4 | Heated Oxygen Sensor (HO2S)2 Connector |
| Callout | Component Name |
|---|---|
| 1 | C406 (Fuel Controls) |
| 2 | C406 (EVAP Controls) |
| 3 | Evaporative Emission (EVAP) Canister Vent Solenoid |
| Callout | Component Name |
|---|---|
| 1 | Idle Air Control (IAC) |
| 2 | C150 |
| 3 | Generator |
| 4 | Generator B+ |
| 5 | Throttle Position (TP) Sensor |
| 6 | Intake Air Temperature (IAT) |
| Callout | Component Name |
|---|---|
| 1 | Fuel Injector 1 |
| 2 | Fuel Injector 2 |
| 3 | Fuel Injector 3 |
| 4 | Fuel Injector 4 |
| Callout | Component Name |
|---|---|
| 1 | Fuel Tank Pressure (FTP) Sensor |
| 2 | Fuel Pump and Sender Assembly |
| 3 | Fuel Pump Strainer |
| 4 | Fuel Level Sensor |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.
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