PCM Power Input Signal Intermittent
The PCM is losing its power input intermittently.
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 isn't getting consistent power, which can lead to various performance issues or it shutting down.
What the computer is actually seeing
The Powertrain Control Module (PCM) detects inconsistent voltage levels from its power source. It requires a steady input of 12V-14V to function properly; fluctuations below 10V or above 16V may trigger this code.
What a healthy reading looks like
12V to 14V steady voltage at the power input; max fluctuation should not exceed 1V within this range.
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.
- 1Check battery voltage; it should be between 12V to 14V.
- 2Inspect all wiring and connectors leading to the PCM for damage or corrosion.
- 3Ensure battery terminals are clean and tight. Test voltage at the PCM connector; should be steady 12V-14V.
- 4If voltage is fluctuating or low, test and replace the battery if needed. If battery is good, check alternator output and connections.
- 5If power at the PCM is consistent but the code persists, consider the PCM as a possible fault.
Common causes
- Faulty wiring or connectors to the PCM
- Weak battery or bad battery connections
- Faulty PCM
- Corrosion at connectors
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's moderate severity; you can drive but should address the issue soon to prevent a breakdown.
Will this code come back if I clear it?
If the underlying cause isn't fixed, yes, the code will likely return.
Why do I see this code alongside other power control codes?
They often trigger together due to common wiring issues or shared power sources.
Working a real vehicle right now?
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