OBD Guide
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P1265

Cylinder #5 High To Low Side Short

P1265 is an OBD-II diagnostic trouble code meaning: Cylinder #5 High To Low Side Short. Common causes: damage to the injector wiring harness, fuel injector malfunction. Estimated repair cost: $17–89.

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

Symptoms

  • Misfire in cylinder 5
  • Uneven engine operation
  • Power Loss
  • Increased fuel consumption
  • Check Engine Light Is On

Causes

  • Damage to the injector wiring harness
  • Fuel injector malfunction
  • Short circuit in control circuit
  • Problems with the engine control unit
  • Contact corrosion

How to Fix

  1. Check the integrity of the injector wiring harness
  2. Measure the injector resistance
  3. Check contacts and connectors
  4. Replace the faulty injector if necessary
  5. Flash or replace the ECU if a malfunction is detected

Related codes

P1266P1264P0205

Error P1265 by Vehicle Brand

FordLincolnMercury

FAQ

What does the P1265 code mean?

P1265 is an OBD-II diagnostic trouble code that indicates: Cylinder #5 High To Low Side Short

What causes a P1265 error code?

The most common causes of P1265 include: Damage to the injector wiring harness; Fuel injector malfunction; Short circuit in control circuit; Problems with the engine control unit.

How do I fix a P1265 diagnostic trouble code?

To fix P1265: Check the integrity of the injector wiring harness. Measure the injector resistance. Check contacts and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1265?

Limited driving only, diagnose soon

How much does it cost to fix P1265?

The estimated repair cost for P1265 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat