OBD Guide
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P3089

Signal Line for Fuel Pump Electronics

P3089 is an OBD-II diagnostic trouble code meaning: Signal Line for Fuel Pump Electronics. Common causes: open or short circuit in the signal line circuit, oxidation or poor contact in connectors. Estimated repair cost: $17–89.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$17–89 (est.)

Symptoms

  • Difficulty starting the engine
  • Floating engine speed
  • Stalls when driving
  • Power Loss
  • Check Engine light comes on

Causes

  • Open or short circuit in the signal line circuit
  • Oxidation or poor contact in connectors
  • Malfunction of the electronic fuel pump control unit
  • Wiring harness damage
  • Fuel pump relay or fuse faulty

How to Fix

  1. Check the integrity of the wiring and signal line connectors
  2. Check the condition of the fuses and relays of the fuel pump
  3. Check the operation of the electronic fuel pump control unit
  4. Replace damaged wires or connectors
  5. Update ECU firmware if necessary

Related codes

P3087P3088P3090

FAQ

What does the P3089 code mean?

P3089 is an OBD-II diagnostic trouble code that indicates: Signal Line for Fuel Pump Electronics

What causes a P3089 error code?

The most common causes of P3089 include: Open or short circuit in the signal line circuit; Oxidation or poor contact in connectors; Malfunction of the electronic fuel pump control unit; Wiring harness damage.

How do I fix a P3089 diagnostic trouble code?

To fix P3089: Check the integrity of the wiring and signal line connectors. Check the condition of the fuses and relays of the fuel pump. Check the operation of the electronic fuel pump control unit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P3089?

Do not drive — repair immediately

How much does it cost to fix P3089?

The estimated repair cost for P3089 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat