OBD Guide
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P1584

Throttle Control Unit Input Circuit Malfunction

P1584 is an OBD-II diagnostic trouble code meaning: Throttle Control Unit Input Circuit Malfunction. Common causes: throttle position sensor malfunction, open or short circuit in control circuit. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Check Engine light comes on
  • Reduced engine power
  • Unstable engine idling
  • Dips during acceleration
  • The car goes into emergency mode

Causes

  • Throttle Position Sensor Malfunction
  • Open or short circuit in control circuit
  • Poor contact in connectors
  • Malfunction of the throttle control unit
  • Problems with power or grounding of the circuit

How to Fix

  1. Check the condition of connectors and wiring
  2. Test throttle position sensors
  3. Check resistance and continuity
  4. Scan the control unit for additional errors
  5. If necessary, replace faulty components

Related codes

P0120P0121P0220P0222

Error P1584 by Vehicle Brand

BuickCadillacChevroletChryslerFordGMGMCLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1584 code mean?

P1584 is an OBD-II diagnostic trouble code that indicates: Throttle Control Unit Input Circuit Malfunction

What causes a P1584 error code?

The most common causes of P1584 include: Throttle Position Sensor Malfunction; Open or short circuit in control circuit; Poor contact in connectors; Malfunction of the throttle control unit.

How do I fix a P1584 diagnostic trouble code?

To fix P1584: Check the condition of connectors and wiring. Test throttle position sensors. Check resistance and continuity. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1584?

Limited driving only, diagnose soon

How much does it cost to fix P1584?

The estimated repair cost for P1584 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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