OBD Guide
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P05C2

Engine Coolant Pressure Sensor Circuit

P05C2 is an OBD-II diagnostic trouble code meaning: Engine Coolant Pressure Sensor Circuit. Common causes: faulty coolant pressure sensor, open or short circuit in sensor wiring. Estimated repair cost: $22–133.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–133 (est.)

Symptoms

  • Check Engine Light Is On
  • Possible engine emergency mode with power limitation
  • Coolant temperature readings may be unstable
  • Cooling system warning on instrument panel
  • In rare cases, engine overheating when the protection system is not working

Causes

  • Faulty coolant pressure sensor
  • Open or short circuit in sensor wiring
  • Poor contact or corrosion in the sensor connector
  • Coolant leak leading to pressure drop
  • ECU malfunction (extremely rare)

How to Fix

  1. Connect the diagnostic scanner, read all codes and frozen frame data
  2. Check the level and condition of the coolant in the expansion tank
  3. Inspect the coolant pressure sensor and its connector for damage or corrosion.
  4. Check the sensor wiring with a multimeter: 5V power supply, ground, integrity of the signal wire
  5. Check the sensor readings with a scanner in real time and compare with the actual pressure
  6. Replace the sensor if it is confirmed to be faulty after eliminating wiring problems

Related codes

P05C3P05C4P05C5P05C6P0597P0217

Error P05C2 by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P05C2 code mean?

P05C2 is an OBD-II diagnostic trouble code that indicates: Engine Coolant Pressure Sensor Circuit

What causes a P05C2 error code?

The most common causes of P05C2 include: Faulty coolant pressure sensor; Open or short circuit in sensor wiring; Poor contact or corrosion in the sensor connector; Coolant leak leading to pressure drop.

How do I fix a P05C2 diagnostic trouble code?

To fix P05C2: Connect the diagnostic scanner, read all codes and frozen frame data. Check the level and condition of the coolant in the expansion tank. Inspect the coolant pressure sensor and its connector for damage or corrosion.. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P05C2?

Limited driving only, diagnose soon

How much does it cost to fix P05C2?

The estimated repair cost for P05C2 is $22–133. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat