2004 Saturn Ion Red LineFACTORY OEM SERVICE PROCEDURE

Boost Control System Operation

Fig 1: Boost Control Bypass Valve Open
GM858882Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 By-Pass Valve Actuator
2 Boost Signal
3 Boost Control Solenoid
4 Boost Source
5 Supercharger
6 Intake Plenum
7 By-Pass Valve
8 Throttle
9 Air Cleaner
10 MAF Sensor
11 Inlet Vacuum Signal


Fig 1: Bypass Valve Closed
GM858889Courtesy of GENERAL MOTORS CORP.
Callout Component Name
1 By-Pass Valve Actuator
2 Boost Signal
3 Boost Control Solenoid
4 Boost Source
5 Supercharger
6 Intake Plenum
7 By-Pass Valve
8 Throttle
9 Air Cleaner
10 MAF Sensor
11 Inlet Vacuum Signal
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

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.

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.