OBD Guide
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P1633

Keep Alive Power Voltage Too Low

P1633 is an OBD-II diagnostic trouble code meaning: Keep Alive Power Voltage Too Low . Common causes: low or faulty battery, problems with the generator. Estimated repair cost: ~$333.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
~$333 (est.)

Symptoms

  • Resetting the radio and clock settings
  • Unstable engine operation after starting
  • Difficulty starting the engine
  • Other fault codes appear
  • Flashing warning lights on the dashboard

Causes

  • Low or faulty battery
  • Problems with the generator
  • Open or poor contact in the KAM power circuit
  • Battery terminal corrosion
  • Engine control unit malfunction

How to Fix

  1. Check battery and generator voltage
  2. Inspect and clean battery terminals
  3. Check the integrity of the wiring to the control unit
  4. Check the contacts in the control unit connectors
  5. If necessary, replace the control unit

Related codes

P0562P0563P1602

Error P1633 by Vehicle Brand

BMWBuickCadillacChevroletGMGMCKiaLexusMazdaOldsmobileSaturnToyotaVolkswagen

FAQ

What does the P1633 code mean?

P1633 is an OBD-II diagnostic trouble code that indicates: Keep Alive Power Voltage Too Low

What causes a P1633 error code?

The most common causes of P1633 include: Low or faulty battery; Problems with the generator; Open or poor contact in the KAM power circuit; Battery terminal corrosion.

How do I fix a P1633 diagnostic trouble code?

To fix P1633: Check battery and generator voltage. Inspect and clean battery terminals. Check the integrity of the wiring to the control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1633?

Yes, but get it checked soon

How much does it cost to fix P1633?

The estimated repair cost for P1633 is ~$333. Actual cost depends on your vehicle, location, and labor rates.

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