OBD Guide
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P06E8

Sensor Power Supply C Circuit High

P06E8 is an OBD-II diagnostic trouble code meaning: Sensor Power Supply C Circuit High. Common causes: internal malfunction of the ecu power stabilizer, connecting the c wire to the higher voltage wire. Estimated repair cost: $22–889.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$22–889 (est.)

Symptoms

  • Check Engine light on
  • Inflated sensor readings on the diagnostic scanner
  • Error codes for sensors with the “Circuit High” type
  • Possible failure of several sensors
  • Unstable or incorrect engine operation

Causes

  • Internal malfunction of the ECU power stabilizer
  • Connecting the C wire to the higher voltage wire
  • Damaged insulation in the wiring harness
  • Poor quality wiring repair with incorrect connection
  • Generator voltage regulator malfunction causing network overvoltage

How to Fix

  1. Measure the actual voltage at the power terminal of circuit C
  2. Check the voltage of the on-board network (normal 13.8–14.4 V when the engine is running)
  3. Inspect the wiring harness for a short between wires on circuit C and adjacent wires.
  4. Check ECU grounding
  5. If the wiring is in good condition and the on-board network voltage is normal, diagnose the ECU
  6. After eliminating the cause, check the serviceability of the sensors in circuit C

Related codes

P06E6P06E7P06D4P06D8P0642

Error P06E8 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P06E8 code mean?

P06E8 is an OBD-II diagnostic trouble code that indicates: Sensor Power Supply C Circuit High

What causes a P06E8 error code?

The most common causes of P06E8 include: Internal malfunction of the ECU power stabilizer; Connecting the C wire to the higher voltage wire; Damaged insulation in the wiring harness; Poor quality wiring repair with incorrect connection.

How do I fix a P06E8 diagnostic trouble code?

To fix P06E8: Measure the actual voltage at the power terminal of circuit C. Check the voltage of the on-board network (normal 13.8–14.4 V when the engine is running). Inspect the wiring harness for a short between wires on circuit C and adjacent wires.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P06E8?

Yes, but get it checked soon

How much does it cost to fix P06E8?

The estimated repair cost for P06E8 is $22–889. Actual cost depends on your vehicle, location, and labor rates.

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