P2610
ECM/PCM Internal Engine Off Timer Performance
- Severity
- Low
- Driving
- No driving restriction
The module's engine-off timer is not performing correctly. The module times how long the engine has been standing so it knows whether the next start is genuinely cold - many of the self-tests that make up emissions readiness only run after a long enough soak. With the timer unreliable, those tests may never run.
Possible causes
- CommonLoss of the permanent battery feed to the module
- CommonBattery disconnected or repeatedly going flat
- CommonLoose or corroded battery terminals interrupting the permanent supply
- PossibleInternal module fault
- PossibleParasitic drain keeping modules awake
What you might notice
- Emissions readiness monitors not completing
- Failed or refused emissions test
- Check engine light on
- Usually no drivability symptom
What to check, in order
- Check the permanent battery feed to the module and the battery terminals. This timer depends on an uninterrupted supply, so a loose terminal resets it every time.
- Ask whether the battery has been disconnected or gone flat recently - that explains the code without anything being wrong.
- Check for a parasitic drain if the battery goes flat when the car stands.
- Do not book an emissions test until the readiness monitors have completed. They need a cold start after a genuine overnight soak, and that cannot be rushed.
Read this code from your own car
Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.
Where this code sits
P00xxP01xxP02xxP03xxP04xxP05xxP06xxP07xxP08xxP09xxP0AxxP0BxxP0CxxP0DxxP0ExxP0FxxP10xxP11xxP12xxP13xxP14xxP15xxP16xxP17xxP18xxP19xxP1AxxP1BxxP1CxxP1DxxP1ExxP1FxxP20xxP21xxP22xxP23xxP24xxP25xxP26xxP27xxP28xxP29xxP2AxxP2BxxP2CxxP2DxxP2ExxP2FxxP30xxP31xxP32xxP33xxP34xxP35xxP36xxP37xxP38xxP39xxP3AxxP3BxxP3CxxP3DxxP3ExxP3Fxx
Computer output circuits and control module
P2600P2601P2602P2603P2604P2605P2606P2607P2608P2609P2610P2611P2612P2613P2614P2615P2616P2617P2618P2619P2620P2621P2622P2623P2624P2625P2626P2627P2628P2629P2630P2631P2632P2633P2634P2635P2636P2637P2638P2639P2640P2641P2642P2643P2644P2645P2646P2647P2648P2649P2650P2651P2652P2653P2654P2655P2656P2657P2658P2659P2660P2661P2662P2663P2664P2665P2666P2667P2668P2669P2670P2671