OBD Guide
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P13A3

Super Knocking Cylinder 4 Injection Switch Off

P13A3 is an OBD-II diagnostic trouble code meaning: Super Knocking Cylinder 4 Injection Switch Off. Common causes: poor fuel quality (low octane number), malfunction of the knock sensor or its wiring. Estimated repair cost: $6–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–167 (est.)

Symptoms

  • Loss of engine power
  • Uneven engine operation (triple)
  • Increased engine vibration
  • Illumination of the fault warning lamp (Check Engine)
  • Possible popping sounds in the exhaust system

Causes

  • Poor fuel quality (low octane number)
  • Malfunction of the knock sensor or its wiring
  • Excessive carbon formation in the combustion chamber
  • Problems with the cylinder cooling system (faulty cylinder head gasket, clogged passages)
  • Mechanical engine problems (piston ring wear, piston defect)

How to Fix

  1. Check and, if necessary, replace the knock sensor and its wiring
  2. Assess the condition of the cylinder (compression, endoscopy) to identify mechanical damage
  3. Flush the fuel supply system and use fuel with the recommended octane rating
  4. Check the engine cooling system for efficiency
  5. Reset the code and test drive it to check

Related codes

P0327P0328P1300

FAQ

What does the P13A3 code mean?

P13A3 is an OBD-II diagnostic trouble code that indicates: Super Knocking Cylinder 4 Injection Switch Off

What causes a P13A3 error code?

The most common causes of P13A3 include: Poor fuel quality (low octane number); Malfunction of the knock sensor or its wiring; Excessive carbon formation in the combustion chamber; Problems with the cylinder cooling system (faulty cylinder head gasket, clogged passages).

How do I fix a P13A3 diagnostic trouble code?

To fix P13A3: Check and, if necessary, replace the knock sensor and its wiring. Assess the condition of the cylinder (compression, endoscopy) to identify mechanical damage. Flush the fuel supply system and use fuel with the recommended octane rating. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P13A3?

Do not drive — repair immediately

How much does it cost to fix P13A3?

The estimated repair cost for P13A3 is $6–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat