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AutoCodes - Generic - P1621

P1621 Code - Control Module Long Term Memory Performance Condition

- Code Popularity: 57,251 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1621?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Powertrain Control Modules (PCM)
  • Low car battery voltage
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How to Fix the DTC P1621?

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

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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1621 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

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

Need More Information on the Code?

Need more information on how to fix the P1621 code? Get Access to Factory Service Manuals

Information for Specific Makes

  • P1621 Audi Instrument Panel Engine Coolant Temperature Signal Short To Ground
  • P1621 Buick Control Module Long Term Memory Performance Condition
  • P1621 Cadillac Control Module Long Term Memory Performance Condition
  • P1621 Chevrolet Control Module Long Term Memory Performance Condition
  • P1621 Dodge Oxygen Sensor Reference Voltage Circuit Low
  • P1621 GMC Control Module Long Term Memory Performance Condition
  • P1621 Hyundai Fuel Cut Valve Malfunction
  • P1621 Isuzu Engine Control Module Internal Memory Performance
  • P1621 Jaguar Engine Control Module Internal Memory Performance
  • P1621 Mazda Engine Control Module Incorrect Immobilizer Code After Cranking
  • P1621 Pontiac Control Module Long Term Memory Performance Condition
  • P1621 RAM Oxygen Sensor Reference Voltage Circuit Low
  • P1621 Saab Control Module Long Term Memory Performance
  • P1621 Saturn Control Module Long Term Memory Performance Condition

Need Help with the Code?

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Code P1621 comments

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