AutoCodes – Chrysler – P0191 Chrysler

P0191 Chrysler Code - Fuel Rail Pressure Sensor Circuit Range/Performance

Quick Answer

This Diagnostic Trouble Code (DTC) is mapped to an idle diagnostic and runs only at idle. Common causes include Low or no fuel, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure 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: P0191 Chrysler indicates Fuel Rail Pressure Sensor Circuit Range/Performance.
Common causes: Common causes include Low or no fuel, Faulty Fuel Rail Pressure (FRP) Sensor, Fuel Rail Pressure 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.

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Code Popularity 274

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 Nov 04, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0191 Chrysler Description

This Diagnostic Trouble Code (DTC) is mapped to an idle diagnostic and runs only at idle. The key-on error monitors fuel pressure voltage at key-on after an eight-hour cold soak. The Powertrain Control Module (PCM) varies fuel pressure and monitors the final fueling and engine speed to determine if the rate of change of fueling with respect to the rate of change of pressure is within the normal operation limits of the pressure sensor. The engine must be at operating temperature and must not be in an active aftertreatment regeneration mode in order to run this diagnostic. The idle monitor runs once per drive cycle and the PCM will light the MIL lamp after the diagnostic runs and fails in two consecutive drive cycles. The PCM will turn off the MIL lamp after the diagnostic runs and passes in four consecutive drive cycles. The DTC will be set when at idle, the rate of change in fueling with respect to the rate of change of pressure is below the calibrated fail high threshold or above the calibrated fail low threshold while the monitor was running.

OBDII Code P0191 Chrysler - Fuel Rail Pressure Sensor Circuit Range/Performance - AutoCodes.com — P0191 Chrysler Code - Fuel Rail Pressure Sensor Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0191 Chrysler?

Low or no fuel
Faulty Fuel Rail Pressure (FRP) Sensor
Fuel Rail Pressure harness is open or shorted
Fuel Rail Pressure circuit poor electrical connection
Faulty Fuel Pump

How to Fix the DTC P0191 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 P0191 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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Need more information on how to fix the P0191 Chrysler code? Get Access to Factory Service Manuals

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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.

Frequently Asked Questions about P0191 Chrysler Code

What does the OBDII code P0191 mean on a Chrysler?

P0191 indicates a Fuel Rail Pressure Sensor Circuit Range/Performance issue, meaning the sensor is detecting fuel pressure outside the expected range.

What are the symptoms of a P0191 code on a Chrysler?

Symptoms may include engine stalling, rough idling, poor acceleration, reduced fuel efficiency, and an illuminated Check Engine Light.

What causes the P0191 code on a Chrysler?

Common causes include a faulty fuel rail pressure sensor, damaged wiring or connectors, a failing fuel pump, or a clogged fuel filter.

Can a dirty fuel filter trigger a P0191 code?

Yes, a clogged fuel filter can restrict fuel flow and cause fuel pressure irregularities, potentially triggering the P0191 code.

How do you diagnose the P0191 code on a Chrysler?

Diagnosis typically involves scanning for codes, inspecting the fuel rail pressure sensor, checking the wiring and connectors, testing the fuel pump, and measuring fuel pressure with a gauge.

Is it safe to drive with a P0191 code on a Chrysler?

Driving with a P0191 code is not recommended as it may lead to poor engine performance, stalling, or potential damage to the fuel system.

How do you fix a P0191 code on a Chrysler?

Common fixes include replacing the fuel rail pressure sensor, repairing damaged wiring, cleaning or replacing the fuel filter, or replacing a failing fuel pump.

Can a bad fuel pump cause the P0191 code?

Yes, a failing fuel pump can lead to inconsistent fuel pressure readings, triggering the P0191 code.

Can low fuel levels trigger a P0191 code on a Chrysler?

In some cases, extremely low fuel levels can cause erratic fuel pressure readings, potentially triggering the P0191 code.

How much does it typically cost to repair a P0191 code on a Chrysler?

Repair costs vary but can range from $150 to $500, depending on whether the issue involves replacing the sensor, repairing wiring, or addressing fuel system components.