AutoCodes – Generic – P2291

P2291 Code - Injector Control Pressure Too Low Engine Cranking

Quick Answer

The Powertrain Control Module (PCM) monitors the Injector Control Pressure (ICP) sensor. Common causes include Faulty Injector Control Pressure (ICP) sensor, Injector Control Pressure (ICP) sensor harness is open or shorted, Injector Control Pressure (ICP) sensor 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: P2291 indicates Injector Control Pressure Too Low Engine Cranking.
Common causes: Common causes include Faulty Injector Control Pressure (ICP) sensor, Injector Control Pressure (ICP) sensor harness is open or shorted, Injector Control Pressure (ICP) sensor 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 23,661

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2291 Description

The Powertrain Control Module (PCM) monitors the Injector Control Pressure (ICP) sensor. The code sets when the signal from the sensor is out of factory specifications, and the PCM will go to open loop control of injection control pressure (operate from an estimated injection control pressure).
The ICP sensor is a variable capacitance sensor that, when supplied with a 5-volts reference signal from the PCM, produces a linear analog voltage signal that indicates pressure.
The ICP sensor's primary function is to provide a feedback signal to indicate rail pressure so that the PCM con command the correct injector timing and pulse width and the correct injection control pressure for the proper fuel delivery at all speed and load conditions.

OBDII Code P2291 - Injector Control Pressure Too Low Engine Cranking - AutoCodes.com — P2291 Code - Injector Control Pressure Too Low Engine Cranking

What does this mean?

What are the Possible Causes of the DTC P2291?

Faulty Injector Control Pressure (ICP) sensor
Injector Control Pressure (ICP) sensor harness is open or shorted
Injector Control Pressure (ICP) sensor circuit poor electrical connection

How to Fix the DTC P2291?

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 P2291 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 P2291 code?

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Information for Specific Makes

P2291 Dodge — Injector Control Pressure Too Low Engine Cranking
P2291 Ford — Injector Control Pressure Too Low Engine Cranking

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.