Diagnostic Trouble Code Definitions

2001 Chevrolet Impala PoliceSECTION Diagnostic Trouble Code Definitions
DIAGNOSTIC TROUBLE CODE DEFINITIONS

DTC (1) Description
P1554  Cruise Control Feedback Circuit
P1585  Cruise Inhibit Output Circuit
(1) Codes listed in table are only for testing covered in this article. For complete DTC listings, see appropriate BODY CONTROL MODULES article.
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.

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.