Skip the auto shop - Our mechanics make house calls

P2506 OBD-II Trouble Code: ECM/PCM Power Input Signal Range/Performance

Check Engine Light

P2506 code definition

ECM/PCM Power Input Signal Range/Performance

What the P2506 code means

P2506 is an OBD-II generic code for the Engine Control Module (ECM) detecting if the power input signal is not within range or when its performance is not as specified.

What causes the P2506 code?

  • The ECM/PCM monitors the power input of the car to be within a specified range and performance level. If the input voltage does not stay within specifications, the code is set and the Check Engine Light is illuminated.

  • The vehicle battery supplies power to the ECM/PCM and if the voltage was below or drops below the specified minimum, then it causes the ECM /PCM to set the code.

What are the symptoms of the P2506 code?

  • The battery is too low to crank the vehicle properly.
  • The battery may be overcharged and voltage is above the specified range.
  • The battery may keep getting drained overnight.

How does a mechanic diagnose the P2506 code?

  • Scan codes and document the codes in the ECM/PCM.
  • Check the battery voltage level and load test the battery.
  • Start the engine and check if the charging system is within specifications.
  • Check if the voltage to the ECM/PCM is correct and stays within specifications.
  • Check the battery and electrical system for a draw of power from the battery.

Common mistakes when diagnosing the P2506 code?

  • Replacing the ECM/PCM when the battery is being drained of power overnight.
  • Failing to clear the ECM/PCM codes after the codes are fixed.
  • Replacing parts when the connection is loose or corroded to the battery.

How serious is the P2506 code?

Code P2506 is a code that the electrical power to the ECM/PCM is either too low or too high. These conditions can lead to failed batteries or a overcharged charging system, which could ruin electrical components or batteries causing them to fail.

What repairs can fix the P2506 code?

Additional comments for consideration regarding the P2506 code

Code P2506 is not a very common code and are used mostly by diesel vehicles. The battery being low on voltage supply to the ECM/PCM is the common cause for the code.

Need help with a P2506 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...


Related questions

Q: No start

Hello. A no start condition can be caused by a wide variety of issues, and from what you describe it would appear that the vehicle may have more than one issue. If spraying brake cleaner into the intake helped...

Q: Can't pass smog check due to Check Engine light.

In your case I would recommend getting a second opinion. Enlist the help of a professional, such as one from YourMechanic, to scan your vehicle for trouble codes. The check engine light and the smog test failure are certainly related....

Q: Code p0101

The P0101 trouble code may keep returning if the engine computer does not see the MAF sensor input within a specified range when it is testing the MAF input. The input can be wrong if the engine has another problem...