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U0423moderate severity✨ AI-generated

Invalid Data Received from Vehicle Speed Control Module

The vehicle's control module is reporting invalid speed data.

Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.

What it means (plain English)

The speed control module is sending the wrong information to the vehicle's computer, which could affect functions like cruise control.

What the computer is actually seeing

The vehicle's main computer expects a certain format for speed data from the speed control module but is receiving data that doesn't match expectations, which causes it to trigger a fault.

What a healthy reading looks like

The control module should send a speed signal that is consistent and typically ranges from 0 to 120 mph (0 to 193 km/h) depending on vehicle speed.

Guided diagnostic — the DiagCoach way

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

  1. 11. Check the vehicle's wiring to the speed control module for any visible damage or loose connections. Decision: If okay, proceed; if not, repair or replace as needed.
  2. 22. Inspect the connectors at the speed control module for corrosion or looseness. Decision: If clear, continue; if corroded, clean or replace.
  3. 33. Use a scan tool to check for additional codes related to the speed control system. Decision: If codes are present, diagnose those; if not, proceed to next step.
  4. 44. Verify the vehicle speed using a diagnostic tool while driving. The speed should match the display on the scanner (within +/- 5%). Decision: If matched, suspect module replacement; if not, continue diagnosis.

Common causes

  • Faulty speed control module
  • Bad wiring or connectors to the module
  • Software glitch in the vehicle's main computer
  • Corrosion or damage in connection points

Typical repair cost

$$$

Related codes

Frequently asked questions

Is it safe to drive with this code?

It may be drivable, but operations like cruise control will likely be impaired; fix soon.

Will this problem come back after clearing the code?

If the cause isn't resolved, the code will likely return.

Why does this code appear with other errors?

Multiple codes often indicate a broader issue in the vehicle's speed control or data communication systems.

Working a real vehicle right now?

Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.

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