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 Find the Keyless Code on a Ford Explorer or Mercury Mountaineer
Many Ford Explorers and Mercury Mountaineers were manufactured with an option known as the Ford keyless entry keypad. Some models refer to it as SecuriCode as well. It...
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...
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...


Related questions

Q: Car starts and runs perfectly for 3-4 minutes then stalls and won't restart for several hours.

Hi there. From the description you have provided, your vehicle's P0335 code is not being corrected by replacing components. Assuming, the replacement components are correct by application and of OEM (original equipment manufacturer) quality. It could be, the crankshaft reluctor...

Q: Maintenance light - 2003 Honda Pilot

Hi there. There are numerous reasons this could be happening. The most likely reason a light may come on is that it is due for oil change. If you can, check your mileage since your last oil change and determine...

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...