P0605

Control Module Fault

Generic code Computer Output Circuit High severity Hard repair

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iWhat P0605 means

The fault code P0605 indicates that there is an internal error with the engine control module's read-only memory (ROM). This error may cause various drivability issues and may prevent the vehicle from starting.

!Possible symptoms

Engine may not start or may stall
Illuminated check engine light
Engine may run poorly or have reduced power
Vehicle may fail to shift gears correctly
Various warning lights on the instrument cluster may illuminate

?Possible causes

Corrupted or damaged read
only memory (ROM) in the engine control module (ECM)
Faulty wiring or connections in the ECM circuit
Loose or corroded electrical connections
Failed ECM power supply, ground or reference voltage
Failed ECM

⚙Related parts

Engine Control Module (ECM): ECM is the part of the car computer that controls the engine system and performance. Problems lead to poor fuel economy, engine stalling & unwanted engine vibrations

✓Possible solutions

Replace the engine control module (ECM) if necessary
Check and repair any damaged wiring or connections
Tighten or clean any loose or corroded electrical connections
Check and repair the power supply, ground or reference voltage for the ECM
Perform a software update or reflash on the ECM

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P0605 on OBD DashX

Real-world causes, how often this code shows up, and the fix — step by step.

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