P2610 code internal engine off timer performance problem cause

This site has the better description of the issue. It is a timer issue where the engine control module doesn't know how long the engine has been off.

https://www.yourmechanic.com/article/p2610-obd-ii-trouble-code-ecm-pcm-internal-engine-off-timer-performance-by-jay-safford

https://www.google.com/search?q=cadillac+p2610

It is ecm or pcm timer code needs to be properly diagnostic tested to determine actual problems need good shop to perform the test

P0606 , P0607 ! no such codes P06006 or P06007
DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P1600, P1621, P1627, P1680, P1681, P1683, or P2610
DTC P0606 Control Module Internal Performance
The DTC P0606 and P2610 set when the powertrain control module (PCM) has determined that the control module has an internal fault. The PCM performs continuous self checks of all internal circuits. There are 2 central processing units (CPU) within the control module. If the outputs from the two CPUs deviates from the standard level, a DTC P0606 sets. The control module has several internal clock or timer circuits. The DTC P2610 diagnostic monitors the internal timer circuit responsible for the ignition OFF operation of the evaporative emission (EVAP) system vacuum leak pump. If the there is an error in the control module timer, a DTC P2610 sets.

"DTC P2610 is set if an internal ECM problem is detected.
1.With ignition OFF, remove both ECM connectors.
2.Wait at least one minute.
3. Replace the connectors making sure to completely seat and lock them.
4.Turn the ignition ON with the engine OFF, and clear the stored codes.Verify the MIL light turns OFF, and stays OFF. If the MIL light does not turn OFF, repeat the clear code command until it the MIL light remains OFF.
5.Turn OFF the ignition and leave it OFF for at least one minute.
6.Turn the ignition back ON with engine OFF and observe that the DTC does not reset.
If the DTC P2610 is still set, repeat Steps 1 through 6 one additional time. If Steps 1 through 6 still do not correct the DTC P2610, verify there is constant battery voltage to ECM Connector C1- terminal 77. (circuit 440 / orange wire) If battery voltage is not present on Connector C1- terminal 77, troubleshoot and repair the circuit."

Error p2610 means the clock in the ECM and soaker timer of the EVAP system doesn't syncronize. Usually that is caused by a bad ECM since it's all built-in. Try clearing the code first to see if it happens again.

If a P2610 has been verified do not replace the ECM. Perform the following steps when encountering a P2610.

Turn the IGNITION OFF for 90 seconds. Unplug both the engine control module (ECM) connectors for 90 seconds. After 90 seconds has passed, re-install the ECM connectors. With the ignition on use the Tech2 and clear all codes in the ECM. This procedure should prevent future sets of the P2610. For 2006 and certain 2007 model vehicles, there may also be a calibration update available which addresses P2610 false sets.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

the code means this ECM/PCM INTERNAL ENGINE OFF TIME PERFORMANCE

Hi there!

The definiton of your fault code P2610 is ECM/PCM Internal Engine Off Timer Performance

The only info I have relates to this being an engine management ECU (DME) problem. The info doesnt go into specifics but says that the car requires a software update, then further diagnosis if this is unsuccessful. Worst case would be DME failure.

FOR CODE P2106 (INTERNAL ENGINE OFF TIMER PERFORMANCE) THE FLOW CHART WILL LEAD YOU TO BELIEVE ITS THE PCM. THIS WILL PROBABLY NOT FIX IT. FIRST CHECK TO SEE IF NON FACTORY SPARK PLUGS HAVE BEEN INSTALLED. IF THEY HAVE THIS IS MOST LIKELY THE CAUSE.THEY WILL PRODUCE INTERFERENCE THRU THE COIL WIRING AND CAUSE THE PCM TO THINK THERE IS A PROBLEM. SIMPLY PUT FACTORY PLUGS BACK IN ENGINE AND CLEAR CODES.PROBLEM SHOULD BE GONE.I HAVE BEEN THRU THIS. SID CODESPOTI (SERVICE MANAGER)STOKES MAZDA, CHARLESTON,SC

p2610 is engine contro module or ecu the cars main computer for both fuel injection and ignition,Remove the large block connector going to the ecu and spray both with contact cleaner,should sort it.