OBD Guide
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P1819

Internal Mode Switch

P1819 is an OBD-II diagnostic trouble code meaning: Internal Mode Switch. Common causes: malfunction of the internal mode switch (ims), problems with wiring to the switch. Estimated repair cost: $33–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$33–167 (est.)

Symptoms

  • Incorrect gear shifting
  • Check Engine Light Illuminates
  • The gearbox goes into emergency mode
  • Certain programs are not included
  • Incorrect display of selector position on the instrument panel

Causes

  • Malfunction of the internal mode switch (IMS)
  • Problems with wiring to the switch
  • Poor contact in connectors
  • Transmission control module (TCM) malfunction
  • Mechanical damage to the switch

How to Fix

  1. Check the condition of the wiring and connectors
  2. Check the resistance of the mode switch
  3. Scan the TCM for additional errors
  4. Replace internal mode switch if necessary
  5. Reflash or replace the TCM module if it is faulty

Related codes

P0705P0706P0707

Error P1819 by Vehicle Brand

BuickCadillacChevroletFordGMGMCLincolnMercuryOldsmobileSaturnVolkswagen

FAQ

What does the P1819 code mean?

P1819 is an OBD-II diagnostic trouble code that indicates: Internal Mode Switch

What causes a P1819 error code?

The most common causes of P1819 include: Malfunction of the internal mode switch (IMS); Problems with wiring to the switch; Poor contact in connectors; Transmission control module (TCM) malfunction.

How do I fix a P1819 diagnostic trouble code?

To fix P1819: Check the condition of the wiring and connectors. Check the resistance of the mode switch. Scan the TCM for additional errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1819?

Limited driving only, diagnose soon

How much does it cost to fix P1819?

The estimated repair cost for P1819 is $33–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat