ECM Power Input Signal Intermittent
The MAXXFORCE-P2509 (MaxxForce) diesel fault code means: ECM Power Input Signal Intermittent. This is a moderate severity code.
- Keep driving?
- Short distances only
- DIY difficulty
- intermediate
- Estimated cost
- $50-$300
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Common Symptoms
- Intermittent stall
- No-start events
- CEL
Probable Causes (Ranked by Likelihood)
- Loose ECM battery feed Likely
- Corroded battery terminal Likely
Step-by-Step Diagnostic Procedure
Inspect main power feed at ECM.
Clean terminals / replace cables.
Frequently Asked Questions
What is P2509 on a MaxxForce 13 (12.4L)?
P2509 on a MaxxForce 13 (12.4L) (2008-2014) indicates: ECM Power Input Signal Intermittent. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.
Can I drive with P2509 on my MaxxForce?
Only drive short distances to reach a repair facility. Continued operation may cause further damage or progressive derate.
How much does it cost to fix MaxxForce P2509?
Repair cost is typically $50-$300 depending on the underlying cause and shop rate. Many MaxxForce faults (especially EGR cooler, head bolt, and VGT repairs) are major expenses that drove fleet owners to repower with Cummins or retire these trucks early.
P2509 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: