AutoCodes – Chrysler – P1691 Chrysler

P1691 Chrysler Code - Fuel Injection Pump Controller Calibration Error

Quick Answer

P1691 Chrysler indicates Fuel Injection Pump Controller Calibration Error. Common causes include AC Noise Across Fuel Transfer Pump, Other DTCs Present, Wiring & Connectors. 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: P1691 Chrysler indicates Fuel Injection Pump Controller Calibration Error.
Common causes: Common causes include AC Noise Across Fuel Transfer Pump, Other DTCs Present, Wiring & Connectors.
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 2,400

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 P1691 Chrysler Description

OBDII Code P1691 Chrysler - Fuel Injection Pump Controller Calibration Error - AutoCodes.com — P1691 Chrysler Code - Fuel Injection Pump Controller Calibration Error

What does this mean?

What are the Possible Causes of the DTC P1691 Chrysler?

AC Noise Across Fuel Transfer Pump
Other DTCs Present
Wiring & Connectors
Fuel Injection Pump Static Timing
Fuel Sync Signal Circuit Open
Fuel Sync Signal Circuit Short To Ground
Engine Control Module (ECM)

How to Fix the DTC P1691 Chrysler?

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 P1691 Chrysler 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.