SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPLYMOUTH1984HORIZON BASE, 1.6 AREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 3 (ENGINE CONTROLS - TESTS W/CODES - 2.5L FLEX FUEL)CODES/MESSAGES (NOTE: FOR DTC TABLE, SEE TEST TC-1A UNDER "SELF-DIAGNOSTICS."CODE 34
1984 Plymouth Horizon Base, 1.6 A

Code 34

1984 Plymouth Horizon Base, 1.6 ASECTION Code 34
WARNING: This page is about a different car, the 1994 Plymouth Acclaim and 1994 Dodge Spirit. However, it is still accessible from the selected car via links, so may be relevant.

DRB displays SPEED CONTROL SOLENOID CIRCUITS. Condition is: open or shorted condition detected in Speed Control (S/C) vacuum or vent solenoid circuits.



DRB displays SPEED CONTROL SWITCH ALWAYS LOW. Condition is: speed control switch input less than minimum acceptable voltage.



DRB displays SPEED CONTROL SWITCH ALWAYS HIGH. Condition is: speed control switch input more than maximum acceptable voltage.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

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

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

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.