OBD Guide
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P05C7

Economy Mode Switch Circuit/Open

P05C7 is an OBD-II diagnostic trouble code meaning: Economy Mode Switch Circuit/Open. Common causes: broken wire in the eco mode switch circuit, poor contact or oxidation in switch connector. Estimated repair cost: $11–67.

Severity
✅ Low
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$11–67 (est.)

Symptoms

  • Check Engine Light Is On
  • Eco mode is not activated when pressing the button
  • Eco Mode button does not respond to presses
  • There is no indication of active Eco mode on the instrument panel
  • Possible slight increase in fuel consumption

Causes

  • Broken wire in the Eco Mode switch circuit
  • Poor contact or oxidation in switch connector
  • Faulty switch (broken internal contacts)
  • Damage to wiring during repairs or exposure to external factors
  • Malfunction in the control unit (rare)

How to Fix

  1. Connect the diagnostic scanner, read all error codes and frozen frame data
  2. Find the Eco Mode switch according to the car's electrical diagram
  3. Inspect the switch connector - check contacts, moisture, oxidation
  4. Use a multimeter to check the integrity of the wiring from the switch to the ECU
  5. Check the switch itself for functionality (resistance/short circuit when pressed)
  6. Replace the switch or repair damaged wiring

Related codes

P05C8P05C9P05CAP05D0P05D1

Error P05C7 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05C7 code mean?

P05C7 is an OBD-II diagnostic trouble code that indicates: Economy Mode Switch Circuit/Open

What causes a P05C7 error code?

The most common causes of P05C7 include: Broken wire in the Eco Mode switch circuit; Poor contact or oxidation in switch connector; Faulty switch (broken internal contacts); Damage to wiring during repairs or exposure to external factors.

How do I fix a P05C7 diagnostic trouble code?

To fix P05C7: Connect the diagnostic scanner, read all error codes and frozen frame data. Find the Eco Mode switch according to the car's electrical diagram. Inspect the switch connector - check contacts, moisture, oxidation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05C7?

Do not drive — repair immediately

How much does it cost to fix P05C7?

The estimated repair cost for P05C7 is $11–67. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat