OBD Guide
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P03D3

Cylinder 7 Pressure Sensor Circuit Low

P03D3 is an OBD-II diagnostic trouble code meaning: Cylinder 7 Pressure Sensor Circuit Low. Common causes: broken signal wire of cylinder 7 pressure sensor, signal wire short circuit to ground. Estimated repair cost: $22–133.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–133 (est.)

Symptoms

  • Check Engine light on
  • No data from cylinder 7 in the diagnostic scanner
  • Possible unstable operation of cylinder 7
  • Slight reduction in engine efficiency
  • Intermittent misfires

Causes

  • Broken signal wire of cylinder 7 pressure sensor
  • Signal wire short circuit to ground
  • Internal sensor failure (short inside)
  • Damage to the connector or the contact being pulled out of the connector
  • Contact corrosion

How to Fix

  1. Disconnect the cylinder 7 pressure sensor connector
  2. Measure the voltage of the signal contact in the harness without a connected sensor (expected ~5V reference)
  3. If the voltage in the harness is normal, replace the sensor
  4. If the voltage is low, test the signal wire for open and short circuit to ground
  5. Eliminate the detected wiring defect or replace the sensor
  6. Connect the connector, reset the codes, start the engine and check

Related codes

P03D1P03D4P03DFP0307

Error P03D3 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P03D3 code mean?

P03D3 is an OBD-II diagnostic trouble code that indicates: Cylinder 7 Pressure Sensor Circuit Low

What causes a P03D3 error code?

The most common causes of P03D3 include: Broken signal wire of cylinder 7 pressure sensor; Signal wire short circuit to ground; Internal sensor failure (short inside); Damage to the connector or the contact being pulled out of the connector.

How do I fix a P03D3 diagnostic trouble code?

To fix P03D3: Disconnect the cylinder 7 pressure sensor connector. Measure the voltage of the signal contact in the harness without a connected sensor (expected ~5V reference). If the voltage in the harness is normal, replace the sensor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P03D3?

Do not drive — repair immediately

How much does it cost to fix P03D3?

The estimated repair cost for P03D3 is $22–133. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat