Glow Plug Control Module
The MAXXFORCE-P0670-7 (MaxxForce) diesel fault code means: Glow Plug Control Module. This is a moderate severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
- Estimated cost
- $250-$700
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Common Symptoms
- Hard cold start
- CEL
Probable Causes (Ranked by Likelihood)
- Failed GPCM Likely
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
Step-by-Step Diagnostic Procedure
Verify 12V supply to GPCM.
Replace module.
Commonly Affected Vehicles
- International TerraStar MaxxForce 7
- International 4300 DuraStar MaxxForce 7
- International WorkStar 7300 MaxxForce 7
- IC Bus CE-Series MaxxForce 7
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