AutoCodes – Dodge – P1290 Dodge

P1290 Dodge Code - CNG Fuel System Pressure Too High Condition

Quick Answer

P1290 Dodge indicates CNG Fuel System Pressure Too High Condition. Common causes include Faulty CNG Shut Off Relay, CNG Shut Off Relay harness is open or shorted, CNG Shut Off Relay 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: P1290 Dodge indicates CNG Fuel System Pressure Too High Condition.
Common causes: Common causes include Faulty CNG Shut Off Relay, CNG Shut Off Relay harness is open or shorted, CNG Shut Off Relay 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 12,474

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 Aug 07, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1290 Dodge Description

OBDII Code P1290 Dodge - CNG Fuel System Pressure Too High Condition - AutoCodes.com — P1290 Dodge Code - CNG Fuel System Pressure Too High Condition

What does this mean?

What are the Possible Causes of the DTC P1290 Dodge?

Faulty CNG Shut Off Relay
CNG Shut Off Relay harness is open or shorted
CNG Shut Off Relay circuit poor electrical connection

How to Fix the DTC P1290 Dodge?

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 P1290 Dodge 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.