OBD Guide
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P1301

Cylinder 1 Misfiring Detected

P1301 is an OBD-II diagnostic trouble code meaning: Cylinder 1 Misfiring Detected. Common causes: faulty spark plug, problems with the ignition coil. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • The engine runs rough or shakes
  • Power Loss
  • Increased fuel consumption
  • Check Engine Light Is On
  • Dips during acceleration

Causes

  • Faulty spark plug
  • Problems with the ignition coil
  • Low cylinder compression
  • Clogged fuel injector
  • Problems with the crankshaft position sensor

How to Fix

  1. Check and replace spark plug in cylinder 1
  2. Check the ignition coil and high-voltage wires
  3. Check compression in cylinder
  4. Clean or replace fuel injector
  5. Check the crankshaft position sensor and its wiring

Related codes

P0301P1300P1302

Error P1301 by Vehicle Brand

AcuraFordHondaInfinitiLincolnMercurySubaru

FAQ

What does the P1301 code mean?

P1301 is an OBD-II diagnostic trouble code that indicates: Cylinder 1 Misfiring Detected

What causes a P1301 error code?

The most common causes of P1301 include: Faulty spark plug; Problems with the ignition coil; Low cylinder compression; Clogged fuel injector.

How do I fix a P1301 diagnostic trouble code?

To fix P1301: Check and replace spark plug in cylinder 1. Check the ignition coil and high-voltage wires. Check compression in cylinder. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1301?

Yes, but get it checked soon

How much does it cost to fix P1301?

The estimated repair cost for P1301 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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