OBD Guide
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P0601

Internal Control Module Memory Checksum Error

P0601 is an OBD-II diagnostic trouble code meaning: Internal Control Module Memory Checksum Error. Common causes: damage to ecu memory due to incorrect flashing, voltage surge in the on-board network (short circuit, battery connection with incorrect polarity). Estimated repair cost: $167–889.

Severity
🚨 Critical
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$167–889 (est.)

Symptoms

  • The engine does not start or is very unstable
  • Many unrelated error codes at the same time
  • Check Engine Light Is On
  • Unstable operation of all ECU-controlled systems
  • Inability to erase error after repair

Causes

  • Damage to ECU memory due to incorrect flashing
  • Voltage surge in the on-board network (short circuit, battery connection with incorrect polarity)
  • Physical damage to the ECU memory chip
  • Electrostatic discharge when working with the ECU
  • Critical overheating of the ECU

How to Fix

  1. Check the supply voltage and quality of the ECU ground
  2. Try to reprogram (reflash) the ECU with official software
  3. Check the unit for signs of flooding, corrosion, overheating on the board
  4. If memory damage is confirmed, repair the ECU (chip resoldering) or replace
  5. After installing a new ECU, carry out adaptation and binding of the immobilizer
  6. Complete all necessary onboarding procedures at the dealer

Related codes

P0600P0602P0603P0604P0605

Error P0601 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0601 code mean?

P0601 is an OBD-II diagnostic trouble code that indicates: Internal Control Module Memory Checksum Error

What causes a P0601 error code?

The most common causes of P0601 include: Damage to ECU memory due to incorrect flashing; Voltage surge in the on-board network (short circuit, battery connection with incorrect polarity); Physical damage to the ECU memory chip; Electrostatic discharge when working with the ECU.

How do I fix a P0601 diagnostic trouble code?

To fix P0601: Check the supply voltage and quality of the ECU ground. Try to reprogram (reflash) the ECU with official software. Check the unit for signs of flooding, corrosion, overheating on the board. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0601?

Do not drive — repair immediately

How much does it cost to fix P0601?

The estimated repair cost for P0601 is $167–889. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat