OBD-II Code
P0607
Severity
Not yet reviewed
Nobody on our side has assessed this code yet, so we are not going to guess at how serious it is.
Can you drive it
We cannot say
Treat it as unknown until a shop reads it with live data. If the check-engine light is FLASHING, stop driving as soon as it is safe to — that means an active misfire, whatever the code.
Indicative cost (USD)
$0–$1,800
From this code's diagnostic notes. Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
$0 (reflash) to $1,800 (replacement plus programming).
P0607 means the ECU/PCM has run its internal self-test routines and detected a fault inside the module itself — a RAM/ROM checksum failure, an internal CPU watchdog reset, an A/D converter out-of-range condition, or a processor-side voltage rail outside spec.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then follow the diagnostic notes further down this page, in the order they are written.
They are written in the order a shop works this code, cheapest checks first. Where they name a component, inspect its wiring and connector before replacing it.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Check engine light
Read the full diagnostic procedureP0607 means the ECU/PCM has run its internal self-test routines and detected a fault inside the module itself — a RAM/ROM checksum failure, an intern…
P0607 means the ECU/PCM has run its internal self-test routines and detected a fault inside the module itself — a RAM/ROM checksum failure, an internal CPU watchdog reset, an A/D converter out-of-range condition, or a processor-side voltage rail outside spec. This is one of the few codes where the part the ECU complains about is actually the part that's broken, but it doesn't mean you immediately replace the PCM — modern modules will throw P0607 from external causes that stress the internal hardware.
The cheapest-first ladder
- verify battery voltage at the PCM connectors with the engine running (should be 13.5-14.5V on the main power pin, with under 0.1V drop on the grounds).
- Check for water intrusion at the PCM connectors — many vehicles mount the PCM low on the firewall or under the cowl, and a clogged cowl drain dumps water onto the module.
- Disconnect the battery for 15+ minutes to force a hard reset, then re-scan; if P0607 returns immediately without driving, the internal fault is real.
- Try a software reflash (most OEMs offer free PCM updates for emission-related codes) before condemning the module — a corrupted calibration after a failed prior reflash is a known cause.
- Caveat: the expensive misdiagnosis is replacing the PCM ($600-$1,800 plus programming) when the actual fault is a chronic low-voltage condition from a failing alternator or a corroded ground strap stressing the module's voltage rails — fix the upstream electrical fault first.
Vehicle-specific patterns2008-2014 Chrysler/Dodge/Jeep vehicles with the TIPM (Caravan, Town & Country, Wrangler, 300, Charger) frequently throw P0607 secondary to TIPM volta…
- 2008-2014Chrysler/Dodge/Jeep vehicles with the TIPM (Caravan, Town & Country, Wrangler, 300, Charger) frequently throw P0607 secondary to TIPM voltage drops that hammer the PCM's power supply; the TIPM is the upstream fix, not the PCM.
- 2007-2013GM full-size trucks (Silverado, Sierra, Suburban) throw P0607 from PCM water intrusion under the cowl when the cowl screen plugs with leaves and water pools onto the module — a $30 PCM-tray reseal solves it.
- 2005-2010Ford F-Series Super Duty throws P0607 from chafed PCM harness over the valve cover causing intermittent shorts.
- 2010-2015Hyundai/Kia vehicles with the Theta II engine throw P0607 after a failed reflash attempt; a Hyundai-dealer SmartFlash repeat usually clears it.
Estimated repair$0 (reflash) to $1,800 (replacement plus programming).
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