OBD Guide
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P1261

Cylinder #1 High To Low Side Short

P1261 is an OBD-II diagnostic trouble code meaning: Cylinder #1 High To Low Side Short. Common causes: damage to the wiring in the ignition circuit, ignition coil malfunction. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Unstable engine operation
  • Misfire in cylinder 1
  • Power Loss
  • Increased fuel consumption
  • Check engine light is on

Causes

  • Damage to the wiring in the ignition circuit
  • Ignition coil malfunction
  • Problems with the engine control unit
  • Short circuit in wiring harness
  • Spark plug fault

How to Fix

  1. Check the integrity of the wiring in the ignition circuit
  2. Test the ignition coil of cylinder 1
  3. Check the functionality of the spark plug
  4. Diagnose the engine control unit
  5. Replace damaged components

Related codes

P1260P1262P0351

Error P1261 by Vehicle Brand

FordLincolnMercury

FAQ

What does the P1261 code mean?

P1261 is an OBD-II diagnostic trouble code that indicates: Cylinder #1 High To Low Side Short

What causes a P1261 error code?

The most common causes of P1261 include: Damage to the wiring in the ignition circuit; Ignition coil malfunction; Problems with the engine control unit; Short circuit in wiring harness.

How do I fix a P1261 diagnostic trouble code?

To fix P1261: Check the integrity of the wiring in the ignition circuit. Test the ignition coil of cylinder 1. Check the functionality of the spark plug. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1261?

Limited driving only, diagnose soon

How much does it cost to fix P1261?

The estimated repair cost for P1261 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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