P16D8 Code - PCM Internal IMA-CAN Communication Circuit Malfunction
Quick Answer
The Integrated Motor Assist-Controller Area Network (IMA-CAN) uses two signal lines, IMACANH and IMACANL, and it receives and transmits multiple signals simultaneously to/from multiple control modules. Common causes include Controller Integrated Motor Assist-Controller Area Network (IMA-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
- P16D8 indicates PCM Internal IMA-CAN Communication Circuit Malfunction.
- Common causes
- Common causes include Controller Integrated Motor Assist-Controller Area Network (IMA-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.
Code P16D8 Description
When IMA-CAN communication between the FI CPU and the CVT CPU inside the Powertrain Control Module (PCM) is abnormal and IMA-CAN communication is interrupted for a specified time, a malfunction is detected and a DTC is stored.
What are the Possible Causes of the DTC P16D8?
- Controller Integrated Motor Assist-Controller Area Network (IMA-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 P16D8?
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 P16D8 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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Information for Specific Makes
- P16D8 Acura — PCM Internal IMA-CAN Communication Circuit Malfunction
- P16D8 Buick — Sensor Supply Voltage Relay Control Circuit Low Voltage
- P16D8 Cadillac — Sensor Supply Voltage Relay Control Circuit Low Voltage
- P16D8 Chevrolet — Sensor Supply Voltage Relay Control Circuit Low Voltage
- P16D8 GMC — Sensor Supply Voltage Relay Control Circuit Low Voltage
- P16D8 Honda — PCM Internal IMA-CAN Communication Circuit Malfunction
Frequently Asked Questions about P16D8 Code
1. What are common symptoms of OBDII code P16D8 (PCM Internal IMA-CAN Communication Circuit Malfunction)?
- Common symptoms include check engine light illumination, poor engine performance, and potential issues with the hybrid system in hybrid vehicles.
2. What are some possible causes of OBDII code P16D8?
- Possible causes include a faulty PCM (Powertrain Control Module), issues with the IMA-CAN communication circuit, wiring problems, or a malfunctioning hybrid system in hybrid vehicles.
3. How can I diagnose OBDII code P16D8?
- Diagnosing this code usually involves using a scan tool to read the code, checking the wiring and connections related to the IMA-CAN communication circuit, and testing the PCM for proper functionality.
4. Can OBDII code P16D8 be triggered in both gasoline and hybrid vehicles?
- Yes, this code can be triggered in both gasoline and hybrid vehicles, but it is more commonly associated with issues in hybrid vehicles due to the nature of the IMA-CAN communication circuit.
5. What are some repair tips for addressing OBDII code P16D8?
- Repair tips may include inspecting and repairing any damaged wiring or connectors in the IMA-CAN communication circuit, ensuring the PCM is functioning correctly, and addressing any issues with the hybrid system in hybrid vehicles.
6. Is it safe to continue driving with OBDII code P16D8 present?
- It is recommended to address the underlying issue causing the code as soon as possible to prevent potential damage to the vehicle and ensure optimal performance.
7. Can I reset OBDII code P16D8 on my own?
- While you can clear the code using a scan tool, it is important to diagnose and repair the root cause of the issue to prevent the code from reoccurring.
8. How much does it typically cost to repair OBDII code P16D8?
- Repair costs can vary depending on the underlying issue causing the code, but they may range from a simple wiring repair to a more complex PCM replacement in hybrid vehicles.
9. Will OBDII code P16D8 cause my vehicle to fail an emissions test?
- Yes, this code can cause your vehicle to fail an emissions test, as it indicates a malfunction in the PCM internal communication circuit, which can impact emissions control systems.
10. How long does it usually take to repair OBDII code P16D8?
- The repair time can vary depending on the complexity of the issue, but it may range from a quick wiring repair to a more involved diagnostic process and component replacement, which could take several hours to complete.
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