AutoCodes – Generic – P16E5

P16E5 Code - Sensor Communication Circuit 3 High Voltage

Quick Answer

The Engine Control Module (ECM) uses the Fuel Rail Pressure (FRP) sensor to constantly adjust the high-pressure fuel pump's feed rate so that the ideal pressure is permanently maintained in the high-pressure section (between the high-pressure fuel pump and the injectors) by means of closed-loop control. 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: P16E5 indicates Sensor Communication Circuit 3 High Voltage.
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 16,227

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 30, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16E5 Description

The Engine Control Module (ECM) uses the Fuel Rail Pressure (FRP) sensor to constantly adjust the high-pressure fuel pump's feed rate so that the ideal pressure is permanently maintained in the high-pressure section (between the high-pressure fuel pump and the injectors) by means of closed-loop control. The fuel rail pressure sensor transmits fuel pressure and temperature information via serial data to the ECM. When the fuel pressure is high, the signal voltage is high. When the fuel pressure is low, the signal voltage is low. The ECM controls the fuel pressure regulator, which regulates high-pressure fuel that goes to the fuel injector rails and the injectors. The Diagnostic Trouble Code (DTC) will be set if the Fuel Rail Pressure Sensor Signal is greater than a predefined threshold for greater than 2.6 s.

OBDII Code P16E5 - Sensor Communication Circuit 3 High Voltage - AutoCodes.com — P16E5 Code - Sensor Communication Circuit 3 High Voltage

What does this mean?

What are the Possible Causes of the DTC P16E5?

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 P16E5?

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 P16E5 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 P16E5 code?

Need more information on how to fix the P16E5 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16E5 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P16E5 Buick — Sensor Communication Circuit 3 High Voltage
P16E5 Cadillac — Sensor Communication Circuit 3 High Voltage
P16E5 Chevrolet — Sensor Communication Circuit 3 High Voltage
P16E5 GMC — Sensor Communication Circuit 3 High Voltage

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 P16E5 Code

1. What are the common symptoms of OBDII code P16E5?

- Common symptoms of OBDII code P16E5 include rough idling, engine hesitation, reduced fuel efficiency, and illuminated Check Engine light.

2. What can cause the OBDII code P16E5 to set?

- The OBDII code P16E5 may set due to a faulty sensor, damaged wiring in the sensor circuit, or a problem with the engine control module.

3. How can I diagnose the OBDII code P16E5 at home?

- You can start diagnosing the OBDII code P16E5 at home by checking the sensor connections, inspecting the wiring for any visible damage, and using an OBDII scanner to read the code and live data.

4. What are the repair options for OBDII code P16E5?

- Repair options for OBDII code P16E5 may include replacing the faulty sensor, repairing damaged wiring, or reprogramming the engine control module if necessary.

5. Can driving with the OBDII code P16E5 cause further damage to my vehicle?

- Continuing to drive with the OBDII code P16E5 may lead to reduced engine performance and fuel efficiency, and potentially cause damage to other engine components over time.

6. How much does it typically cost to repair the OBDII code P16E5?

- The cost to repair the OBDII code P16E5 can vary depending on the underlying issue, but it may range from $100 to $500 for parts and labor.

7. Is it safe to continue driving my vehicle with the OBDII code P16E5?

- While it may be safe to drive for a short period with the OBDII code P16E5, it is recommended to have the issue diagnosed and repaired as soon as possible to prevent further damage.

8. Can I reset the OBDII code P16E5 myself?

- You can try resetting the OBDII code P16E5 using an OBDII scanner, but keep in mind that the code will likely return if the underlying issue is not addressed.

9. Will the OBDII code P16E5 affect my vehicle's emissions?

- Yes, the OBDII code P16E5 can impact your vehicle's emissions, potentially causing it to fail emissions tests and leading to increased pollution.

10. How long does it take to repair the OBDII code P16E5?

- The repair time for the OBDII code P16E5 can vary depending on the exact cause of the issue, but it may take a few hours to a full day to complete the repair.

1. What are common symptoms of OBDII code P16E5 (Sensor Communication Circuit 3 High Voltage)?

- Common symptoms include rough idling, engine misfires, decreased fuel efficiency, and potential stalling.

2. What are possible causes of the OBDII code P16E5?

- Possible causes include a faulty sensor, damaged wiring or connectors, issues with the ECM, or a malfunctioning communication network.

3. How can I diagnose the OBDII code P16E5?

- Diagnosis typically involves using a scan tool to read the code, checking the affected sensor and related circuitry for damage or corrosion, and testing the ECM communication.

4. What repairs can I do to fix OBDII code P16E5?

- Repair options may include replacing the faulty sensor, repairing damaged wiring or connectors, resetting the ECM, or addressing any communication network issues.

5. Can I drive my vehicle with the OBDII code P16E5?

- It is not recommended to drive your vehicle with this code present, as it can lead to further damage and potential safety hazards. It is best to address the issue promptly.

6. How much does it typically cost to repair OBDII code P16E5?

- The cost of repair can vary depending on the specific issue causing the code. Repairs may range from a simple sensor replacement to more extensive wiring repairs, potentially costing a few hundred dollars to over a thousand.

7. Can I clear the OBDII code P16E5 with a scan tool?

- Yes, you can use a scan tool to clear the code after addressing the underlying issue. However, if the problem persists, the code may reappear, indicating an ongoing problem.

8. How urgent is it to address the OBDII code P16E5?

- It is recommended to address this code as soon as possible to prevent further damage to your vehicle and ensure optimal performance.

9. Is the OBDII code P16E5 specific to certain car makes and models?

- This code can appear on various car makes and models equipped with OBDII systems, but the specific sensor and communication circuit may vary.

10. Can a DIY enthusiast repair OBDII code P16E5 at home?

- Depending on the underlying issue and your skill level, some repairs related to this code can be done at home. However, complex issues may require professional diagnosis and repair.