OBD Guide
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P183B

Internal Mode Switch 2 D1 Circuit High Voltage

P183B is an OBD-II diagnostic trouble code meaning: Internal Mode Switch 2 D1 Circuit High Voltage. Common causes: malfunction of the internal mode switch, damage to the circuit wiring harness. Estimated repair cost: $17–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–56 (est.)

Symptoms

  • Incorrect gear shifting
  • Check Engine light comes on
  • The car may go into emergency mode
  • Problems starting the engine
  • Reduced transmission efficiency

Causes

  • Malfunction of the internal mode switch
  • Damage to the circuit wiring harness
  • Short circuit in the circuit
  • Transmission Control Module (TCM) Problems
  • Corrosion or poor contact in connectors

How to Fix

  1. Check the integrity of the circuit wiring harness
  2. Check the voltage in the circuit using a multimeter
  3. Inspect connectors for corrosion or damage
  4. Replace internal mode switch if necessary
  5. Check and replace the Transmission Control Module (TCM) if necessary.

Related codes

P183AP183CP183D

FAQ

What does the P183B code mean?

P183B is an OBD-II diagnostic trouble code that indicates: Internal Mode Switch 2 D1 Circuit High Voltage

What causes a P183B error code?

The most common causes of P183B include: Malfunction of the internal mode switch; Damage to the circuit wiring harness; Short circuit in the circuit; Transmission Control Module (TCM) Problems.

How do I fix a P183B diagnostic trouble code?

To fix P183B: Check the integrity of the circuit wiring harness. Check the voltage in the circuit using a multimeter. Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P183B?

Limited driving only, diagnose soon

How much does it cost to fix P183B?

The estimated repair cost for P183B is $17–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat