PCM Read Only Memory (ROM) Error
The POWERSTROKE-P0605 (Power Stroke) diesel fault code means: PCM Read Only Memory (ROM) Error. This is a moderate severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- advanced
- Estimated cost
- $700-$1,500
Down with a Power Stroke fault on the road?
Get connected with a verified mobile diesel mechanic near you. Verified diesel & reefer techs, launching on the freight corridor.
Find a mobile mechanic →A $30 car code reader can't do diesel. The HD7000 reads full-system codes and does parked DPF regen, idle/speed-limit, and service resets from the cab — on everything from a 6.7 Cummins/Power Stroke/Duramax pickup to Class-8 trucks (Detroit, Paccar, CAT, Volvo, Mack, International).
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Full-system 6/9/16-pin diesel scan tool for Cummins, Paccar, CAT, Detroit and more — plug-and-play, no subscription. A cheaper way to read heavy-duty codes a basic OBD2 scanner skips entirely.
Check Price on AmazonAffiliate link -- we earn a commission at no extra cost to you.
Common Symptoms
- Intermittent no-start
- Random stalling
- CEL
Probable Causes (Ranked by Likelihood)
- Internal PCM failure Very Likely
- Low/unstable PCM supply voltage Possible
Step-by-Step Diagnostic Procedure
Measure PCM battery and ignition supply voltage -- must be stable 12V+.
If power is good and code returns, PCM requires replacement + programming.
Frequently Asked Questions
What is P0605 on a 7.3L Power Stroke?
P0605 on a 7.3L Power Stroke (1994-2003) indicates: PCM Read Only Memory (ROM) Error. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.
Can I drive with P0605 on my Power Stroke?
No. Stop driving and arrange for towing. Continued operation risks serious engine or emissions system damage.
How much does it cost to fix P0605?
Repair cost is typically $700-$1,500 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.
P0605 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: