AutoCodes – Generic – P16D7

P16D7 Code - PCM Internal F-CAN Communication Circuit Malfunction

Quick Answer

The Controller Area Network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (CANH and CANL). Common causes include Controller Area Network (CAN) Communication, Faulty Powertrain Control Module (PCM), Powertrain Control Module (PCM) 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: P16D7 indicates PCM Internal F-CAN Communication Circuit Malfunction.
Common causes: Common causes include Controller Area Network (CAN) Communication, Faulty Powertrain Control Module (PCM), Powertrain Control Module (PCM) 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 7,016

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 Jan 10, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P16D7 Description

The Controller Area Network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (CANH and CANL).
When F-CAN communication between the FI CPU and the CVT CPU inside the Powertrain Control Module (PCM) is abnormal and F-CAN communication is interrupted for a specified time, a malfunction is detected and a DTC is stored.

OBDII Code P16D7 - PCM Internal F-CAN Communication Circuit Malfunction - AutoCodes.com — P16D7 Code - PCM Internal F-CAN Communication Circuit Malfunction

What does this mean?

What are the Possible Causes of the DTC P16D7?

Controller Area Network (CAN) Communication
Faulty Powertrain Control Module (PCM)
Powertrain Control Module (PCM) harness is open or shorted
Powertrain Control Module (PCM) circuit poor electrical connection

How to Fix the DTC P16D7?

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 P16D7 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 P16D7 code?

Need more information on how to fix the P16D7 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P16D7 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P16D7 Acura — PCM Internal F-CAN Communication Circuit Malfunction
P16D7 Buick — Sensor Supply Voltage Relay Control Circuit
P16D7 Cadillac — Sensor Supply Voltage Relay Control Circuit
P16D7 Chevrolet — Sensor Supply Voltage Relay Control Circuit
P16D7 GMC — Sensor Supply Voltage Relay Control Circuit
P16D7 Honda — PCM Internal F-CAN Communication Circuit Malfunction

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 P16D7 Code

1. What does the OBDII code P16D7 mean?

P16D7 indicates a malfunction in the PCM's internal F-CAN communication circuit, which affects the vehicle's ability to transmit data between control modules.

2. What are the common symptoms of the P16D7 code?

Common symptoms include the check engine light turning on, erratic transmission behavior, poor engine performance, and communication-related issues between vehicle modules.

3. What causes the P16D7 code to appear?

The code can be caused by a faulty PCM, damaged wiring or connectors in the communication circuit, software glitches, or electrical interference.

4. Can I drive my car with the P16D7 code?

While the vehicle may still be drivable, it is not recommended as the issue can lead to further communication problems and potentially affect drivability or safety systems.

5. How do I diagnose the P16D7 code?

Diagnosis involves scanning for additional codes, inspecting wiring and connectors in the F-CAN circuit, and testing the PCM for functionality.

6. What repairs can fix the P16D7 code?

Repairs may include replacing or repairing damaged wiring, updating PCM software, or, in some cases, replacing the PCM itself.

7. Can a weak battery cause the P16D7 code?

Yes, a weak or failing battery can cause voltage drops that interfere with module communication and trigger the code.

8. How much does it cost to fix a P16D7 code?

Repair costs vary depending on the issue but typically range from $100 for simple wiring repairs to $1,000 or more if the PCM needs replacement.

9. Can a PCM reset clear the P16D7 code?

A reset may temporarily clear the code, but if the underlying issue isnâ€™t resolved, the code will return.

10. Should I update the PCM software if I get a P16D7 code?

Updating the PCM software is a common fix if the issue is related to a software glitch, but itâ€™s best to consult a professional for accurate diagnosis.