OBD Guide
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P182A

Internal Mode Switch 'A' Circuit Low Voltage

P182A is an OBD-II diagnostic trouble code meaning: Internal Mode Switch 'A' Circuit Low Voltage. Common causes: open or short circuit in the mode switch circuit, malfunction of the internal mode switch (ims). Estimated repair cost: $17–89.

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

Symptoms

  • Incorrect display of the current transmission mode on the instrument panel
  • Problems starting the engine (especially in P/N modes)
  • Incorrect gear shifting
  • Transmission transition to emergency mode
  • The Check Engine light comes on

Causes

  • Open or short circuit in the mode switch circuit
  • Malfunction of the internal mode switch (IMS)
  • Connector problems or contact corrosion
  • Transmission control module (TCM) malfunction
  • Problems with power or grounding of the circuit

How to Fix

  1. Check the integrity of the wiring and connectors in the switch circuit
  2. Check the voltage and resistance in the mode switch circuit
  3. Test the operation of the internal mode switch
  4. If necessary, replace the faulty switch or repair the wiring
  5. Check and, if necessary, reflash or replace the transmission control module (TCM)

Related codes

P182BP1829P1830

FAQ

What does the P182A code mean?

P182A is an OBD-II diagnostic trouble code that indicates: Internal Mode Switch 'A' Circuit Low Voltage

What causes a P182A error code?

The most common causes of P182A include: Open or short circuit in the mode switch circuit; Malfunction of the internal mode switch (IMS); Connector problems or contact corrosion; Transmission control module (TCM) malfunction.

How do I fix a P182A diagnostic trouble code?

To fix P182A: Check the integrity of the wiring and connectors in the switch circuit. Check the voltage and resistance in the mode switch circuit. Test the operation of the internal mode switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P182A?

Limited driving only, diagnose soon

How much does it cost to fix P182A?

The estimated repair cost for P182A is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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