OBD Guide
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P030C

Ignition A Control Signal Circuit High

P030C is an OBD-II diagnostic trouble code meaning: Ignition A Control Signal Circuit High. Common causes: ignition coil malfunction, wiring harness damage. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Misfires
  • Unstable engine operation
  • Power reduction
  • Increased fuel consumption

Causes

  • Ignition coil malfunction
  • Wiring harness damage
  • Short circuit in control circuit
  • ECU malfunction

How to Fix

  1. Check the condition of the ignition coil
  2. Inspect the wiring harness for damage
  3. Check control circuit for short circuit
  4. Test the ECU for faults

Related codes

P0301P0302P0303P0304

Error P030C by Vehicle Brand

AcuraAudiBAICBMWBYDBuickCadillacChanganCheryChevroletChryslerCitroenDodgeDongfengExeedFAWFordForthingFotonGACGMGMCGeelyGreat WallHavalHondaHongqiHyundaiInfinitiJACJaecooJaguarJeepJetourKaiyiKiaLadaLexusLi AutoLifanLincolnLivanMazdaMercedes-BenzMercuryMitsubishiNIONissanOldsmobileOmodaOpelPeugeotPlymouthPontiacRenaultSWMSaturnSkodaSkywellSubaruSuzukiTankToyotaVolkswagenVolvoVoyahXPengZeekrZotye

FAQ

What does the P030C code mean?

P030C is an OBD-II diagnostic trouble code that indicates: Ignition A Control Signal Circuit High

What causes a P030C error code?

The most common causes of P030C include: Ignition coil malfunction; Wiring harness damage; Short circuit in control circuit; ECU malfunction.

How do I fix a P030C diagnostic trouble code?

To fix P030C: Check the condition of the ignition coil. Inspect the wiring harness for damage. Check control circuit for short circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P030C?

Limited driving only, diagnose soon

How much does it cost to fix P030C?

The estimated repair cost for P030C is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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