Injector Control Pressure (ICP) Out of Range - Low
The POWERSTROKE-P1280-73 (Power Stroke) diesel fault code means: Injector Control Pressure (ICP) Out of Range - Low. This is a serious severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- intermediate
- Estimated cost
- $90-$600
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
- No start or long crank
- Stalling
- Low power
- CEL
Probable Causes (Ranked by Likelihood)
- Failed ICP sensor (yellow corrosion inside plug is classic 7.3L) Very Likely
- Low engine oil level (ICP uses engine oil as hydraulic medium) Likely
- Failed IPR (Injection Pressure Regulator) valve Likely
- HPOP (High Pressure Oil Pump) worn Possible
- Oil leak in high-pressure oil system Possible
Step-by-Step Diagnostic Procedure
Verify engine oil level first -- low oil causes ICP faults on 7.3L.
Disconnect ICP sensor and check connector for oil seepage / yellow corrosion -- #1 fix on 7.3L.
Measure ICP sensor signal with scan tool -- should read ~0.2V at key-on, rise to 0.8-1.2V at idle.
If ICP won't build, test IPR duty cycle (should be 14-20% at idle).
If IPR and ICP check out, HPOP or high pressure oil system leak is the next suspect.
Frequently Asked Questions
What is P1280 on a 7.3L Power Stroke?
P1280 on a 7.3L Power Stroke (1994-2003) indicates: Injector Control Pressure (ICP) Out of Range - Low. This is a known diagnostic trouble code on this engine family and typically points to the causes listed above.
Can I drive with P1280 on my Power Stroke?
Only drive short distances to get to a repair facility. Continued operation may cause further damage.
How much does it cost to fix P1280?
Repair cost is typically $90-$600 depending on the underlying cause and whether you DIY or use a shop. Diagnostic time alone runs $100-$180 at most independent diesel shops.