OBD Guide
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P0606

Control Module Processor

P0606 is an OBD-II diagnostic trouble code meaning: Control Module Processor. Common causes: internal defect of the ecu processor, overheating of the control unit (incorrect installation, coolant leaks). Estimated repair cost: $22–556.

Severity
🚨 Critical
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–556 (est.)

Symptoms

  • The Check Engine light comes on
  • Emergency mode (limp mode), speed and power limitation
  • Unstable engine operation, random failures
  • Many additional error codes
  • Possible engine start failure

Causes

  • Internal defect of the ECU processor
  • Overheating of the control unit (incorrect installation, coolant leaks)
  • Moisture or corrosion inside the ECU
  • Unstable supply voltage, current surges
  • Damage to ECU connector contacts

How to Fix

  1. Check battery voltage and alternator charging
  2. Inspect the ECU for signs of moisture, corrosion or overheating
  3. Check the ECU connector: contacts, seals, secure fixation
  4. Reset error, check for recurrence - eliminate accidental failure
  5. Send the ECU to a specialized service for diagnostics on a bench
  6. If a processor malfunction is confirmed, replace the ECU

Related codes

P0604P0605P0607P0600

Error P0606 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P0606 code mean?

P0606 is an OBD-II diagnostic trouble code that indicates: Control Module Processor

What causes a P0606 error code?

The most common causes of P0606 include: Internal defect of the ECU processor; Overheating of the control unit (incorrect installation, coolant leaks); Moisture or corrosion inside the ECU; Unstable supply voltage, current surges.

How do I fix a P0606 diagnostic trouble code?

To fix P0606: Check battery voltage and alternator charging. Inspect the ECU for signs of moisture, corrosion or overheating. Check the ECU connector: contacts, seals, secure fixation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P0606?

Yes, but get it checked soon

How much does it cost to fix P0606?

The estimated repair cost for P0606 is $22–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat