P0784: 4-5 Shift Malfunction

Possible Causes

• Faulty shift solenoid or pressure control solenoid
• Low or contaminated transmission fluid
• Wiring or connector issues in the transmission circuit
• Mechanical issues in the transmission
• Faulty transmission control module (TCM)

Diagnosis and Repair

• Scan for transmission-related codes using an OBD-II scanner
• Check transmission fluid level and condition; replace if needed
• Inspect wiring and connectors for damage or corrosion
• Test solenoid operation with a multimeter
• Replace faulty solenoids or repair transmission as needed
• Clear codes and test drive to verify repair

Related Error Codes

See also: P0700, P0701, P0702, P0703, P0704

Keywords: relay diagram, 4-5, vehicle fuse box, shift, automotive wiring, fuse panel layout, fuse replacement guide, car fuse types, fuse and relay guide, p0784:, car electrical system, ECU error codes, malfunction, fuse box diagram, electrical troubleshooting

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