AutoCodes – Mercury – P1232 Mercury

P1232 Mercury Code - Low Speed Fuel Pump Primary Circuit Failure

Quick Answer

P1232 Mercury indicates Low Speed Fuel Pump Primary Circuit Failure. Common causes include Faulty Low Speed Fuel Pump, Faulty Fuel Pump Relay, Low Speed Fuel Pump harness is open or shorted. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P1232 Mercury indicates Low Speed Fuel Pump Primary Circuit Failure.
Common causes: Common causes include Faulty Low Speed Fuel Pump, Faulty Fuel Pump Relay, Low Speed Fuel Pump harness is open or shorted.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,291

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 20, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P1232 Mercury Description

OBDII Code P1232 Mercury - Low Speed Fuel Pump Primary Circuit Failure - AutoCodes.com — P1232 Mercury Code - Low Speed Fuel Pump Primary Circuit Failure

What does this mean?

What are the Possible Causes of the DTC P1232 Mercury?

Faulty Low Speed Fuel Pump
Faulty Fuel Pump Relay
Low Speed Fuel Pump harness is open or shorted
Low Speed Fuel Pump circuit poor electrical connection
Damaged Powertrain Control Module (PCM)

How to Fix the DTC P1232 Mercury?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The Powertrain Control Module (PCM) monitors the Low Speed Fuel Pump (LFP) primary circuit output from the PCM. The test fails if: When the LFP circuit is commanded on (grounded), excessive current draw is detected on the LFP circuit; or when the LFP circuit is commanded off, voltage is not detected on the LFP circuit (the PCM expects to detect VPWR voltage coming through the low speed fuel pump relay coil to the LFP circuit).

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1232 Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P1232 Mercury code?

Need more information on how to fix the P1232 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P1232 Mercury code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.