MAP / Boost Sensor High
The MAXXFORCE-P0238 (MaxxForce) diesel fault code means: MAP / Boost Sensor High. This is a serious severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- intermediate
- Estimated cost
- $120-$450
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Common Symptoms
- CEL
- Limp mode
Probable Causes (Ranked by Likelihood)
- Shorted boost sensor wiring Likely
Step-by-Step Diagnostic Procedure
Inspect harness for chafe.
Replace sensor.
Frequently Asked Questions
What is P0238 on a MaxxForce 13 (12.4L)?
P0238 on a MaxxForce 13 (12.4L) (2008-2014) indicates: MAP / Boost Sensor High. This is a known fault code on the MaxxForce engine family and typically points to the causes listed above.
Can I drive with P0238 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 P0238?
Repair cost is typically $120-$450 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.
P0238 on Other Platforms
The same code ID appears across other engines, vehicles, and equipment. Diagnostic flow varies by platform — see the matching breakdown: