Powertrain Control Module (PCM) Internal Performance
This code indicates an internal performance issue with the PCM.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer that controls the engine and transmission has detected it’s not working correctly, which can happen if it overheats or has a power problem.
What the computer is actually seeing
The PCM is constantly monitoring its performance metrics, looking for correct voltage and signal timing ranges. When it recognizes inconsistent or out-of-spec behavior, such as low voltage (below 8 volts) or incorrect signal timing exceeding 60 milliseconds, it triggers this code.
What a healthy reading looks like
The PCM should maintain operational voltages between 9 - 16 volts. Signal timing for internal checks must stay below 20 milliseconds.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 1Inspect battery voltage; it should be between 9-16 volts. If low, charge or replace the battery.
- 2Check for corroded connectors and damaged wiring leading to the PCM; repair as needed.
- 3Perform a thorough scan to check for additional codes that could indicate related issues.
- 4Update or reflash PCM software if it’s outdated or buggy; ensure the latest version is installed.
Common causes
- Faulty PCM
- Corroded connectors or damaged wiring
- Low battery voltage or poor power supply to the PCM
- Software glitches in the PCM
Typical repair cost
$$$
Related codes
Frequently asked questions
Can I still drive with this code?
Yes, but expect potential drivability issues; fix it soon to avoid further problems.
Will this code come back after clearing it?
It may come back if the underlying issue isn't fixed.
Why does this code pair with others?
Often, an issue with the PCM affects other systems, leading to multiple related codes.
Working a real vehicle right now?
Let DiagCoach walk you through it live with your specific symptoms, vehicle, and what you've already checked.
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