OBD Guide
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P1245

Alternator Load Input Failed Low

P1245 is an OBD-II diagnostic trouble code meaning: Alternator Load Input Failed Low. Common causes: generator malfunction, broken or damaged wiring. Estimated repair cost: $56–278.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–278 (est.)

Symptoms

  • Check Engine Light Is On
  • Low battery charge
  • Unstable engine operation at idle
  • Electrical problems
  • Reduced engine power

Causes

  • Generator malfunction
  • Broken or damaged wiring
  • Poor contact in connectors
  • ECU malfunction
  • Generator relay problems

How to Fix

  1. Check the condition of the generator
  2. Inspect wiring and connectors for damage
  3. Check the voltage at the generator output
  4. Test load signal circuit
  5. If necessary, replace the generator or repair the wiring

Related codes

P0562P0563P0620

Error P1245 by Vehicle Brand

BuickCadillacChevroletChryslerFordGMGMCJaguarLincolnMercuryOldsmobileSaturnSubaruVolkswagen

FAQ

What does the P1245 code mean?

P1245 is an OBD-II diagnostic trouble code that indicates: Alternator Load Input Failed Low

What causes a P1245 error code?

The most common causes of P1245 include: Generator malfunction; Broken or damaged wiring; Poor contact in connectors; ECU malfunction.

How do I fix a P1245 diagnostic trouble code?

To fix P1245: Check the condition of the generator. Inspect wiring and connectors for damage. Check the voltage at the generator output. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1245?

Yes, but get it checked soon

How much does it cost to fix P1245?

The estimated repair cost for P1245 is $56–278. Actual cost depends on your vehicle, location, and labor rates.

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