Fault codeP2610

MODERATE

ECM/PCM Internal Engine Off Timer Performance

What this code means

ECM/PCM Internal Engine Off Timer Performance.

P2610 is a generic code: it means the same thing on every make. P2610 belongs to family P26xx — Control unit and auxiliary outputs. Its page explains how to read a code and groups all its codes by part.

Type of fault

The signal stays within its electrical limits, but its value is not plausible: it does not match what the control unit expects given the other sensors. The sensor may be drifting with age, but it may also be faithfully measuring a real mechanical problem — a leak, a blockage, an air leak. Replacing the sensor without checking does not always clear the fault.

Engine control unit

These codes concern the engine control unit itself: its memory, its processor, its programming or its communication with the other modules. It runs a self-check every time it starts and records a code when one of its tests fails.

What you notice

From nothing at all to an engine that will not start, depending on the fault; other warning lights may come on at the same time.

How to check it

Before suspecting the unit, check its power supplies and grounds, the battery and its terminals: a weak or unstable voltage causes many of these faults. Some codes appear after an update or a repair with the battery disconnected and clear by themselves. A unit that is really faulty is repaired or replaced and reprogrammed by a specialist.

What to do

Have it checked this week. The car remains usable, but the fault will not clear itself and will fail the roadworthiness test.

Clearing a code switches the light off but repairs nothing: if the fault remains, the code comes back. Clearing a fault code yourself →

How to read this code

PPowertrain
2standardised code
6Control unit and auxiliary outputs
10P2610