Glow Plug Control Module
The MAXXFORCE-P0670-7 (MaxxForce) diesel fault code means: Glow Plug Control Module. This is a moderate severity code.
Unverified. We could not confirm this code's definition against freely available manufacturer documentation, so treat the meaning, severity and fix guidance on this page as unconfirmed. Check it against the manufacturer's service information for your exact model and serial range before acting on it. This page is kept out of search engines for that reason, and we are working through this family manual by manual.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
- Estimated cost
- $250-$700
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View pilot availability →What Are the Symptoms of MAXXFORCE-P0670-7?
- Hard cold start
- CEL
What Causes MAXXFORCE-P0670-7? (Most Likely First)
- Failed GPCM Likely
Can I Still Drive with MAXXFORCE-P0670-7?
Yes, but fix soon. MAXXFORCE-P0670-7 is rated moderate severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring it.
Frequently Asked Questions
What is P0670 on a MaxxForce 7 (6.4L)?
P0670 on a MaxxForce 7 (6.4L) (2007-2013) indicates: Glow Plug Control Module. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.
Can I drive with P0670 on my MaxxForce?
Yes, you can generally drive with this code, but diagnose soon to prevent secondary damage.
How much does it cost to fix MaxxForce P0670?
Repair cost is typically $250-$700 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.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose MAXXFORCE-P0670-7?
Verify 12V supply to GPCM.
Replace module.
Which Vehicles Commonly Get MAXXFORCE-P0670-7?
- International TerraStar MaxxForce 7
- International 4300 DuraStar MaxxForce 7
- International WorkStar 7300 MaxxForce 7
- IC Bus CE-Series MaxxForce 7
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