OBD Guide
ENFRDEESPT

P1200

Fuel Pump Relay/ECU Circuit Malfunction

P1200 is an OBD-II diagnostic trouble code meaning: Fuel Pump Relay/ECU Circuit Malfunction. Common causes: faulty fuel pump relay, open or short circuit in control circuit. Estimated repair cost: $6–56.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Engine won't start
  • Floating idle speed
  • Loss of engine power
  • Stalling engine
  • Check Engine Light Is On

Causes

  • Faulty fuel pump relay
  • Open or short circuit in control circuit
  • Poor contact in connectors
  • Power or grounding problems
  • ECU malfunction

How to Fix

  1. Check the condition of the fuel pump relay
  2. Check the integrity of the relay control circuit
  3. Check connectors and contacts for oxidation
  4. Check circuit power and grounding
  5. If necessary, replace the relay or ECU

Related codes

P0230P0627P0628

Error P1200 by Vehicle Brand

BuickCadillacChevroletChryslerGMGMCLexusOldsmobileSaturnToyota

FAQ

What does the P1200 code mean?

P1200 is an OBD-II diagnostic trouble code that indicates: Fuel Pump Relay/ECU Circuit Malfunction

What causes a P1200 error code?

The most common causes of P1200 include: Faulty fuel pump relay; Open or short circuit in control circuit; Poor contact in connectors; Power or grounding problems.

How do I fix a P1200 diagnostic trouble code?

To fix P1200: Check the condition of the fuel pump relay. Check the integrity of the relay control circuit. Check connectors and contacts for oxidation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1200?

Limited driving only, diagnose soon

How much does it cost to fix P1200?

The estimated repair cost for P1200 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat