12684225
BOSCH 12684225 High Pressure Fuel Injector Chevrolet Malibu Equinox Buick 1.5L Turbo SGE 0261500624
12668393, 12692283, 0261500624, 0261500625Fast-Actuating Solenoid Multi-Hole Direct Injection Nozzle-200 barTechnical Specifications
| Specification | Value |
|---|---|
| System Type | Bosch HDEV5.2 Multi-Hole Direct Gasoline Fuel Injector |
| Operating PressureCore Spec | |
| Spray Pattern | Optimized 6-orifice pattern for central combustion ignition |
| Fuel Rail Bolt Torque | 12 N·m (bracket clamping fasteners) |
| High Pressure Pipe Torque | 28 N·m Flare Nut Connection |
| Coil Resistance | 1.5 - 1.9 Ω at 20°C (Direct pulse solenoid control) |
| Common Fault Codes | P0300 (Random Misfire), P0301-P0304 (Cylinder Misfire), P0171 (System Lean Bank 1) |
| Workshop Precaution | Install brand-new Teflon combustion seals using EN-48266 seal expander tool |
Matched High-Pressure Fuel Pump (Fuel Circuit Assembly)
Operates on the same high-pressure rail circuit. When troubleshooting low rail pressure (DTC P0087), verify pump volumetric delivery before replacing injectors.
Installation Tips
- [
- {
- "step": 1,
- "title": "Depressurize Fuel Rail & Remove Intake Duct",
- "instruction": "Depressurize fuel system by removing fuel pump fuse and running engine until shutdown. Disconnect battery negative cable."
- },
- {
- "step": 2,
- "title": "Disconnect Fuel Rail Wire Connectors & Retainers",
- "instruction": "Disconnect injector electrical pigtails. Disconnect fuel feed pipe (28 N·m) and remove fuel rail retaining bolts (12 N·m)."
- },
- {
- "step": 3,
- "title": "Extract Injectors & Renew Teflon Tip Seals",
- "instruction": "Carefully remove injectors from cylinder head bore using EN-47218 remover. Install new Teflon seals and size with calibration sleeve."
- },
- {
- "step": 4,
- "title": "Install Fuel Rail, Torque Bolts & Leak Check",
- "instruction": "Press injectors into cylinder head. Tighten rail bolts to 12 N·m. Torque fuel line nut to 28 N·m. Reconnect battery, prime system and inspect for leaks."
- }
- ]
Diagnostic Trouble Codes & Fault Protocols
Common diagnostic trouble codes (DTCs) triggered when this common rail injector experiences wear, circuit faults, or calibration drift:
Fuel Rail / System Pressure Too Low
Excessive internal backleak from worn control valve seats drops common rail pressure below target under engine load.
Injector Circuit Malfunction / Open Circuit
Solenoid coil resistance drift (0.2-0.5 Ω) or piezo stack degradation triggers driver stage shutdown on affected cylinders.
Cylinder Misfire & Balancing Deviation
Carbon-clogged nozzle spray holes or missing IMA calibration causes uneven cylinder contribution. Recode ECM and verify washer seating.
Fuel Rail / System Pressure Too High
Spill line backpressure or stuck metering valve prevents rail depressurization, creating overpressure risks under load.
Technical Diagnostic & Service Protocols
Authoritative field procedures, diagnostic testing thresholds, and service SOPs for this assembly.