P2610 means the engine control module has detected a problem with its internal engine-off timer, which tracks how long the engine has been shut down for emissions monitor scheduling and evaporative-system diagnostics. The code sets when that timer does not increment, resets unexpectedly, or otherwise performs outside expected limits. It is an internal-module performance code, but in practice it is often triggered by outside electrical support problems rather than by a failed computer.
A weak battery, failing alternator, or parasitic drain can cause the PCM to lose the stable keep-alive voltage it needs to run the engine-off timer, which is the most common real-world trigger for P2610.
Poor connections at the PCM power, ground, or keep-alive memory circuits can interrupt the constant voltage supply and make the internal timer behave erratically.
Some vehicles set this code because of a known software bug or calibration problem; a manufacturer update or reprogram may resolve it without replacing hardware.
If battery voltage, all power/ground paths, and software are verified good, the timer circuit inside the PCM may be faulty, making module replacement the remaining possibility.
Usually not. Most P2610 cases are caused by battery voltage problems, poor connections, or software issues. PCM replacement should only be considered after those more common causes are ruled out.
Yes. The engine-off timer needs stable keep-alive voltage while the ignition is off; a weak or dying battery is a frequent cause of this code.
Generally yes for normal driving, but the check engine light will stay on and emissions readiness monitors may not complete, which can affect an emissions test.
Clearing the light may turn it off temporarily, but if the underlying voltage, connection, or software issue remains, the code will usually return.