P1244 Chevrolet Alternator Load Input Failed High

Possible causes

GEN-MON circuit short to B+.

GEN-COM circuit short to B+.

B+ open prior to start-up.

Open GEN-COM prior to start-up.

Open I-line prior to start-up.

Damaged PCM.

Tech description

Verify the battery voltage is 14.5 volts.

Verify the generator/regulator has the correct part number.

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1244 Chevrolet Description

The 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 high when a battery short to ground exists.