AutoCodes – Generic – P2C20

P2C20 Code - Fuel Pressure Regulator Performance High Pressure During Cold Start

Quick Answer

The control module controls a series of actuators to ensure optimal engine performance. Common causes include Faulty High Pressure Fuel Pump, High Pressure Fuel Pump harness is open or shorted, High Pressure Fuel Pump 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: P2C20 indicates Fuel Pressure Regulator Performance High Pressure During Cold Start.
Common causes: Common causes include Faulty High Pressure Fuel Pump, High Pressure Fuel Pump harness is open or shorted, High Pressure Fuel Pump 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 750

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 May 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2C20 Description

The control module controls a series of actuators to ensure optimal engine performance. The control module does this by reading values from a variety of sensors, interprets the data, and adjusts the engine actuators accordingly. The fuel pressure regulator is a part of the high pressure fuel pump. The fuel pressure regulator is the solenoid valve that controls the pressure in the fuel rail. The Diagnostic Trouble Code (DTC) will be set when the desired fuel rail pressure and the fuel rail pressure are not within 3 MPa (435 PSI) of each other for greater than 30 s. at idle speed.

OBDII Code P2C20 - Fuel Pressure Regulator Performance High Pressure During Cold Start - AutoCodes.com — P2C20 Code - Fuel Pressure Regulator Performance High Pressure During Cold Start

What does this mean?

What are the Possible Causes of the DTC P2C20?

Faulty High Pressure Fuel Pump
High Pressure Fuel Pump harness is open or shorted
High Pressure Fuel Pump circuit poor electrical connection

How to Fix the DTC P2C20?

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 P2C20 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 P2C20 code?

Need more information on how to fix the P2C20 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

P2C20 Buick — Fuel Pressure Regulator Performance High Pressure During Cold Start
P2C20 Cadillac — Fuel Pressure Regulator Performance High Pressure During Cold Start
P2C20 Chevrolet — Fuel Pressure Regulator Performance High Pressure During Cold Start
P2C20 GMC — Fuel Pressure Regulator Performance High Pressure During Cold Start

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 P2C20 Code

1. What does the OBDII code P2C20 mean?

P2C20 indicates that the fuel pressure regulator is not performing as expected, with excessively high fuel pressure detected during a cold start.

2. What are the common symptoms of code P2C20?

Symptoms may include long cranking during cold starts, rough idling, reduced fuel efficiency, or an illuminated check engine light.

3. What causes code P2C20 to trigger?

Common causes include a malfunctioning fuel pressure regulator, a faulty fuel pump, clogged fuel lines, or a problem with the fuel pressure sensor.

4. Can I drive with the P2C20 code active?

Driving with P2C20 active is not recommended, as it can lead to engine performance issues and potentially damage other components.

5. How is code P2C20 diagnosed?

A mechanic will use a scan tool to check fuel pressure readings, inspect the fuel pressure regulator, and test related components for faults during a cold start.

6. What are common fixes for code P2C20?

Fixes may include replacing the fuel pressure regulator, cleaning or replacing fuel lines, replacing a faulty fuel pump, or repairing wiring to the fuel pressure sensor.

7. How much does it cost to fix a P2C20 code?

Repair costs vary depending on the root cause, but replacing a fuel pressure regulator typically costs between $150 and $400, including labor.

8. Can a dirty fuel filter cause code P2C20?

While uncommon, a clogged fuel filter can restrict fuel flow and contribute to pressure issues, which may indirectly trigger P2C20.

9. How can I prevent code P2C20 from occurring?

Regularly maintain the fuel system, use high-quality fuel, and address any starting or performance issues promptly to prevent fuel regulator problems.

10. Does cold weather increase the likelihood of code P2C20?

Yes, cold weather can exacerbate fuel pressure regulation problems, making this code more likely to appear during cold starts.