P0AC4 Code - Hybrid Powertrain Control Module Requested MIL Illumination
Quick Answer
Control modules constantly monitor the vehicle for any condition which may adversely affect vehicle performance. Common causes include Check Hybrid Powertrain Control Module for codes, Faulty Hybrid Powertrain Control Module. 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
- P0AC4 indicates Hybrid Powertrain Control Module Requested MIL Illumination.
- Common causes
- Common causes include Check Hybrid Powertrain Control Module for codes, Faulty Hybrid Powertrain Control Module.
- 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 P0AC4 Description
The DTC will be set when the ECM receives a serial data message from the Hybrid Powertrain Control Module indicating that DTC has been set in the module.
What are the Possible Causes of the DTC P0AC4?
- Check Hybrid Powertrain Control Module for codes
- Faulty Hybrid Powertrain Control Module
How to Fix the DTC P0AC4?
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.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0AC4 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 P0AC4 code?
Need more information on how to fix the P0AC4 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0AC4 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P0AC4 Buick — Hybrid Powertrain Control Module Requested MIL Illumination
- P0AC4 Cadillac — Hybrid Powertrain Control Module Requested MIL Illumination
- P0AC4 Chevrolet — Hybrid Powertrain Control Module Requested MIL Illumination
- P0AC4 GMC — Hybrid Powertrain Control Module Requested MIL Illumination
- P0AC4 Nissan — Hybrid Powertrain Control Module Requested MIL Illumination
Frequently Asked Questions about P0AC4 Code
1. What are the common symptoms of OBDII code P0AC4?
The common symptoms of OBDII code P0AC4 include the Check Engine Light (MIL) illuminating on the dashboard and potential drivability issues in hybrid vehicles.
2. What does OBDII code P0AC4 indicate?
OBDII code P0AC4 indicates a fault related to the Hybrid Powertrain Control Module requesting the MIL (Malfunction Indicator Lamp) to illuminate due to a detected issue in the hybrid powertrain system.
3. What are the possible causes of OBDII code P0AC4?
Possible causes of OBDII code P0AC4 include issues with the hybrid powertrain control module, wiring or connection problems, sensor malfunctions, or faults within the hybrid powertrain system components.
4. How serious is OBDII code P0AC4?
OBDII code P0AC4 should be addressed promptly as it indicates a potential issue with the hybrid powertrain system. Ignoring this code could lead to further damage, reduced vehicle performance, or safety risks.
5. How can I diagnose OBDII code P0AC4?
Diagnosing OBDII code P0AC4 typically involves using an OBDII scanner to retrieve the code, inspecting the hybrid powertrain components, checking for loose connections, and testing sensors related to the system.
6. Can I still drive my vehicle with OBDII code P0AC4?
It is not recommended to drive the vehicle extensively with OBDII code P0AC4 present, as the issue may worsen and affect the performance or safety of the hybrid powertrain system.
7. How can OBDII code P0AC4 be repaired?
Repairing OBDII code P0AC4 may involve resetting the code, checking and repairing any damaged wiring or connections, replacing faulty sensors or components, and ensuring proper functionality of the hybrid powertrain control module.
8. Are there DIY repair tips for OBDII code P0AC4?
While some simple checks like inspecting connections and wiring can be done as DIY repair steps, diagnosing and repairing the cause of OBDII code P0AC4 may require specialized knowledge and tools, so it is recommended to consult a professional mechanic.
9. Can a faulty battery cause OBDII code P0AC4 to appear?
Yes, a faulty hybrid battery or issues with the high-voltage battery system can potentially trigger OBDII code P0AC4 due to disruptions in the hybrid powertrain control module communication or operation.
10. Is it necessary to clear OBDII code P0AC4 after repairs?
Yes, it is important to clear OBDII code P0AC4 after repairs have been made to ensure that the issue has been resolved and to prevent the Check Engine Light from illuminating again unnecessarily.
Discuss the causes and fixes for P0AC4 OBDII Code
-
I replaced a new battery on 2013 Malibu eco and engine light cam out so when I went to autozone for diagnosis the error code was reading p0ac4? please confirm what this coed means or part its referring to
-
The P0AC4 code is an information code only, if there are no other engine codes, then the Hybrid Powertrain Control Module needs to be diagnose. You could start by clearing the code.
-
The engine light came out again and now I am getting code p0c32/p0c11/and p0ac4
-
Please advice what this code p0c32 means as this is the diagnostics I am getting on my car?
can it be cleared?
-
What make, model and year is your car? You should try clearing the code first with a scanner, if the code comes back you have to repair the problem.
-
what does POAC4 Code mean on a 2012 Buick LaCrosse what is wrong when this code comes up?
-
Hola buenas tardes, tengo un nissan altima 2009 hybrid, el cual no enciende, ni en hybrid ni en gasolina, el código que sales es POAC4. Que puedeo hacer y que es este módulo. Muchas gracias.
-
El codigo P0AC4 significa que hay un problema con el systema hybrido, pero no dice exactamente cual es el problema. Este codigo deveria estar acompañado de otro codigo con mas informacion de cual es el problema.
Tiene su Altima otro codigo?
-
ANYTHING CAN BE CLEARE BUT THAT WILL NOT CLEAR THE PROBLEM FROM COMING BACK.
POAC4 IS A GENERAL MIL CODE STAYING ILLUMINATED LONGER UNTIL THE ECU CAN START TEST AND REPEAT ENOUGH TIMES.(catalytic converter monitor) -
I have changed to control module on nissan altima 07 and still get this code what els could it be if not the batteries.
-
I have a 2007 Altima hybrid with this code and P0a4 (inverter converter problem) But my question is does the 12v aux battery has a temperature sensor ? Because I Know they used a AGM battery... Can someone please help or send a picture?? Thanks for your time and consideration....
-
I have a 08 chevy tahoe Hybrid and have
P0AC4
P0BBD
P0700
P061B
P16F9
Showing up can anyone help me with these codes and what needs to be done to fix them? thanks! -
Do you have any other symptoms besides the codes? Just based on the code numbers, sounds like may need a new Hybrid Battery.
P0BBD CHEVROLET - Hybrid Battery Pack Voltage Variation High
Read more: https://www.autocodes.com/p...P061B CHEVROLET - Control Module Torque Calculation Performance
Read more: https://www.autocodes.com/p...P0700 CADILLAC - Transaxle Control System Malfunction
Read more: https://www.autocodes.com/p...P16F9 CHEVROLET - Control Module Shutdown Performance
Read more: https://www.autocodes.com/p... -
I had replaced it with a different one i found online and bought because the chevy dealer had none for sale and couldnt get any and it was working ok then i got the check engine light with thoes codes
-
replaced the motor on my 2013 Malibu this august drove it 1000 miles and had it serviced and oil changed at the end of august 2 weeks later the tension locked up and took out the serpentine belt. I just had this replaced 10 months ago so they replaced it for free every since then I get error codes P0AC4 and P0A90 they still can't figure it out . my ? is when that serpentine belt blew apart what did it hit under the hood did it pinch a wire to give faulty readings did it hit a connector? I don't know, any info would help because the dealers ship it is at doesn't have a clue.Thanks
-
There is a factory service bulletin for the P0A90 code, the bulletin indicates that the dealer have to contact the factory engineers for further instructions. It looks like the tensioner will cause the belt to snap and may have damage the Motor Generator Unit (MGU). My only recommendation at this point is to have the dealer contact the factory. Ask the dealer to check for bulletins, they shouldn't charge you for that.
Click here to enlarge image
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
