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

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...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....


Related questions

Q: Sputtering, misfiring, power loss and gain

Hey there: There are usually two different mechanical problems that cause the symptoms you're describing with your Pontiac Firebird. The first and most common is a problem with the ignition coil, (especially in mid-90's GM V-6 engines) or due to...

Q: What Do Transmission Error Codes Tell You?

Using transmission error codes is a necessary procedure for a transmission technician since automatic transmissions have been computer controlled for over 20 years. The transmissions currently in use are very different to diagnose and repair than transmissions from decades ago....

Q: What are some inexpensive possible solutions for a P2506 code?

A good way to protect yourself in a used car transaction is to request a pre-purchase vehicle inspection. That inspection, carried out by a certified Mechanic, dispatched to your location, will give you very specific data regarding any current problems...