OBD Guide
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P03C8

Cylinder 6 Pressure Sensor Circuit Range/Performance

P03C8 is an OBD-II diagnostic trouble code meaning: Cylinder 6 Pressure Sensor Circuit Range/Performance. Common causes: cylinder 6 pressure sensor malfunction (wear, performance drift), damaged or broken sensor wiring. Estimated repair cost: $44–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$44–167 (est.)

Symptoms

  • Check Engine Light Illuminates
  • Uneven engine operation (more noticeable on multi-cylinder engines)
  • Minor vibration at certain speeds
  • Slight decrease in fuel efficiency
  • Possible misfire in cylinder 6

Causes

  • Cylinder 6 pressure sensor malfunction (wear, performance drift)
  • Damaged or broken sensor wiring
  • Oxidation of connector contacts
  • Problems with the cylinder 6 ignition system
  • Mechanical problems of cylinder 6 (compression, valves)

How to Fix

  1. Read cylinder 6 sensor data in real time and compare with other cylinders
  2. Check the connector and wiring of the cylinder 6 sensor (long harness - greater risk of damage)
  3. Perform electrical tests on the sensor circuit (power, ground, signal)
  4. Check the spark plug and ignition coil of cylinder 6
  5. If necessary, replace the pressure sensor
  6. Reset codes and verify after test drive

Related codes

P03CEP03CFP0306P0396

Error P03C8 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P03C8 code mean?

P03C8 is an OBD-II diagnostic trouble code that indicates: Cylinder 6 Pressure Sensor Circuit Range/Performance

What causes a P03C8 error code?

The most common causes of P03C8 include: Cylinder 6 pressure sensor malfunction (wear, performance drift); Damaged or broken sensor wiring; Oxidation of connector contacts; Problems with the cylinder 6 ignition system.

How do I fix a P03C8 diagnostic trouble code?

To fix P03C8: Read cylinder 6 sensor data in real time and compare with other cylinders. Check the connector and wiring of the cylinder 6 sensor (long harness - greater risk of damage). Perform electrical tests on the sensor circuit (power, ground, signal). For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P03C8?

Do not drive — repair immediately

How much does it cost to fix P03C8?

The estimated repair cost for P03C8 is $44–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat