AutoCodes – Jeep – P1689 Jeep

P1689 Jeep Code - No Communication Between ECM and Injection Pump Module Data

Quick Answer

Fuel Pump Control Module (FPCM) is monitored with ignition on engine off, and with the engine running. Common causes include Faulty Fuel Pump Control Module (FPCM), Fuel Pump Control Module (FPCM) harness is open or shorted, Fuel Pump Control Module (FPCM) circuit poor electrical connection. 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: P1689 Jeep indicates No Communication Between ECM and Injection Pump Module Data.
Common causes: Common causes include Faulty Fuel Pump Control Module (FPCM), Fuel Pump Control Module (FPCM) harness is open or shorted, Fuel Pump Control Module (FPCM) circuit poor electrical connection.
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.

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Code Popularity 4,411

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 Sep 09, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1689 Jeep Description

Fuel Pump Control Module (FPCM) is monitored with ignition on engine off, and with the engine running. The P1689 code may set if FPCM, Powertrain Control Module (PCM) memory, programming or hardware error is detected.

OBDII Code P1689 Jeep - No Communication Between ECM and Injection Pump Module Data - AutoCodes.com — P1689 Jeep Code - No Communication Between ECM and Injection Pump Module Data

What does this mean?

What are the Possible Causes of the DTC P1689 Jeep?

Faulty Fuel Pump Control Module (FPCM)
Fuel Pump Control Module (FPCM) harness is open or shorted
Fuel Pump Control Module (FPCM) circuit poor electrical connection

How to Fix the DTC P1689 Jeep?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1689 Jeep 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.

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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.