AutoCodes – Generic – P1245

P1245 Code - Alternator Load Input Failed Low

Quick Answer

The Powertrain Control Module (PCM) monitors generator load from the generator/regulator in the form of frequency. Common causes include Faulty Alternator/Generator, Broken Alternator Belt, Alternator/Generator harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1245 indicates Alternator Load Input Failed Low.
Common causes: Common causes include Faulty Alternator/Generator, Broken Alternator Belt, Alternator/Generator harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 25,697

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1245 Description

The Powertrain Control Module (PCM) monitors generator load from the generator/regulator in the form of frequency. The fault indicates the input is lower than the load should be in normal operation. The load input could be low when no generator output exists.

OBDII Code P1245 - Alternator Load Input Failed Low - AutoCodes.com — P1245 Code - Alternator Load Input Failed Low

What does this mean?

What are the Possible Causes of the DTC P1245?

Faulty Alternator/Generator
Broken Alternator Belt
Alternator/Generator harness is open or shorted
Alternator/Generator circuit poor electrical connection
Damaged Powertrain Control Module (PCM)

How to Fix the DTC P1245?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1245 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Need Help with the Code?

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Information for Specific Makes

P1245 Audi — Needle Lift Sensor Circuit Short To Ground
P1245 Buick — Intake Plenum Switchover Valve
P1245 Cadillac — Intake Plenum Switchover Valve
P1245 Chevrolet — Intake Plenum Switchover Valve
P1245 Ford — Alternator Load Input Failed Low
P1245 GMC — Intake Plenum Switchover Valve
P1245 Jaguar — No Cranking Signal Low Signal
P1245 Lincoln — Alternator Load Input Failed Low
P1245 Mazda — Alternator Load Input Failed Low
P1245 Mercury — Alternator Load Input Failed Low
P1245 Mitsubishi — Cycle RAM Test
P1245 Subaru — Wastegate Control Solenoid Valve Malfunction Fail-Safe
P1245 Volkswagen — Needle Lift Sensor Circuit Short To Ground

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.