P2508 Fault Code

ECM/PCM Power Input Signal High

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2508 fault code indicates that the Engine Control Module (ECM) or Powertrain Control Module (PCM) is receiving a higher-than-normal power input signal. This discrepancy in power levels can prevent the ECM/PCM from functioning correctly, leading to various engine performance issues.

• Understanding Power Signals: The power input signal is crucial for the operational stability of the ECM/PCM.
• Potential Impact: If the signal is too high, it can indicate an electrical fault or short circuit, potentially causing damage to the control unit.

What are the symptoms of the P2508 code?

When the P2508 fault code is present, the vehicle may exhibit several symptoms:

• Illumination of the Check Engine Light (CEL).
• Engine performance issues, such as misfires or stalling.
• Difficulty starting the engine or intermittent starting problems.
• Possible loss of power while driving, especially under load conditions.

What causes the P2508 code?

There are several common causes for the P2508 fault code, including:

• Faulty wiring or connectors that are damaged or corroded.
• Issues with the vehicle's battery, such as excessive voltage or poor connections.
• A malfunctioning alternator can contribute to voltage spikes.
• Problems in related components, including sensors and actuators that affect power input.

How to fix P2508?

To resolve the P2508 fault code, consider the following steps:

• Inspect electrical connections and wiring related to the ECM/PCM, looking for wear or damage that could lead to high power signals.
• Check the battery and charging system for excessive voltage output or weak connections.
• Test the ECM/PCM for proper function; if it is faulty, replacing the unit may be necessary.
• Clear the fault code after repairs, and conduct a test drive to ensure that the issue has been resolved.