How To Fix Code P1621

P1621 CHEVROLET Code - Control Module Long Term Memory Performance Condition

Repair Importance Level:3/3

Repair Difficulty Level:3/3

|P1621 CHEVROLET code possible causes

Faulty Powertrain Control Modules (PCM)
Low car battery voltage

|How do I fix the P1621 CHEVROLET code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing the P1621 CHEVROLET code

Labor: 1.0

The cost of diagnosing the P1621 CHEVROLET code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P1621 CHEVROLET code detected?

If the checksum of the Electronically Erasable Programmable Read Only Memory (EEPROM) does not match a predetermined value by the Powertrain Control Modules (PCM), DTC P1621 will set.

|What are P1621 CHEVROLET code possible symptoms?

Engine Light ON (or Service Engine Soon Warning Light)

|P1621 CHEVROLET code description

The Powertrain Control Modules (PCM) Electronically Erasable Programmable Read Only Memory (EEPROM) contains data essential to running the engine and transmission. The PCM stores critical preprogrammed data within the EEPROM, this data remains even if the vehicles' battery is disconnected. At power up, the PCM checks the integrity of this data.

OBDII Code P1621 Chevrolet - Control Module Long Term Memory Performance Condition - AutoCodes.com

|P1621 CHEVROLET code comments

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Repair Importance Level: 3

Repair Difficulty Level: 3