P2610Powertrain Control

ECM/PCM Engine Off Timer Performance

The control module has detected that its internal engine-off timer is not performing correctly. This timer measures how long the engine has been off, which several emissions tests rely on. A fault is typically internal to the module or its power supply.

🚗 Yes. This is usually a monitoring fault that does not affect drivability, but it can prevent some emissions monitors from running correctly.

LOW

severity

🎯 Top Causes, Ranked by Likelihood

#1Internal PCM timer fault$200-$700

40%

The module's internal engine-off timer is not functioning correctly.

#2Loss of keep-alive power$40-$250

30%

The module loses standby power that maintains the timer.

#3Corroded power or ground$40-$200

20%

A bad connection interrupts the module standby supply.

#4Weak or failing battery$150-$300

10%

Low standby voltage disrupts the timer between key cycles.

🩺 Common Symptoms

Check engine light is on
Emissions monitors will not complete
No drivability change
Possible failed emissions readiness

💰 Repair Cost: DIY vs Shop

DIY Cost

$40-$300

Shop Cost

$120-$700

📋 Free OBD2 Code Cheat Sheet

The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.

🔧 How to Diagnose P2610

1Verify the module keep-alive power and ground are present with the key off.

2Inspect the battery, cables, and grounds for corrosion or voltage drop.

3Confirm the battery holds voltage and is in good condition.

4Reprogram or replace the control module if the timer fault persists, then clear and retest.

❓ Frequently Asked Questions

What is the engine-off timer?

It is an internal module timer that tracks how long the engine has been off, which some emissions tests need.

Is it safe to drive?

Yes. It does not affect how the car runs, but it can block emissions readiness.

Could a weak battery cause it?

Yes. Loss of standby power from a weak battery or bad connection can disrupt the timer.

🔗 Related Codes

P0562P0563P0620P2505P0700