OBD Guide
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P184A

Internal Mode Switch 2 S Circuit Low Voltage

P184A is an OBD-II diagnostic trouble code meaning: Internal Mode Switch 2 S Circuit Low Voltage. Common causes: malfunction of the internal mode switch, open or short circuit in the circuit. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Incorrect display of the current transmission mode
  • Transmission of the gearbox into emergency mode
  • Gear shifting problems
  • The Check Engine light comes on
  • Reduced vehicle dynamics

Causes

  • Malfunction of the internal mode switch
  • Open or short circuit in the circuit
  • Poor contact in connectors
  • Power or grounding problems
  • Transmission control module (TCM) malfunction

How to Fix

  1. Check the integrity of the wiring and connectors
  2. Measure the voltage in the switch circuit
  3. Check switch resistance
  4. Replace the faulty switch if necessary
  5. Flash or replace the TCM if it is faulty

Related codes

P184BP1849P1848

FAQ

What does the P184A code mean?

P184A is an OBD-II diagnostic trouble code that indicates: Internal Mode Switch 2 S Circuit Low Voltage

What causes a P184A error code?

The most common causes of P184A include: Malfunction of the internal mode switch; Open or short circuit in the circuit; Poor contact in connectors; Power or grounding problems.

How do I fix a P184A diagnostic trouble code?

To fix P184A: Check the integrity of the wiring and connectors. Measure the voltage in the switch circuit. Check switch resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P184A?

Limited driving only, diagnose soon

How much does it cost to fix P184A?

The estimated repair cost for P184A is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat