TSB: MACK CHU, CHU613, CHU614, CMH, CMM, CXU, CXU612, CXU613, CXU613E, CXU614, GRANITE (GU), GU, GU713, GU812E, GU813, GU813E, GU814, LEU, LR, LR6, MRU, PINNACLE (CHU), PINNACLE (CXU), TD, TD713, TD714, TERRAPRO (LEU), TERRAPRO (LEU/MRU), TERRAPRO (MRU), TITAN, TITAN (TD), VOLVO TRUCK (2010–2013)

Bulletin KC-538 — February 21, 2022

Bulletin Details

Bulletin IDKC-538
ManufacturerMACK
ModelsCHU, CHU613, CHU614, CMH, CMM, CXU, CXU612, CXU613, CXU613E, CXU614, GRANITE (GU), GU, GU713, GU812E, GU813, GU813E, GU814, LEU, LR, LR6, MRU, PINNACLE (CHU), PINNACLE (CXU), TD, TD713, TD714, TERRAPRO (LEU), TERRAPRO (LEU/MRU), TERRAPRO (MRU), TITAN, TITAN (TD), VOLVO TRUCK
Model Years2010–2013
Date IssuedFebruary 21, 2022
Date Added to NHTSAMarch 3, 2022
ComponentENGINE (PWS)
Vehicles Affected80 combinations

What is a TSB?

A Technical Service Bulletin is a document issued by the vehicle manufacturer to inform dealership technicians about a known issue and the recommended repair procedure. TSBs are not mandatory recalls — they serve as repair guidance for common problems.

If your vehicle has this issue, bring this bulletin ID to your dealer. If under warranty, the repair should be covered at no cost.

Summary

Regen Fails to Start/Initiate Or Starts And Immediately Stops - US10 And US10+OBD13 Emissions

Affected Vehicles

MakeModelYearComponent
MACK CHU 2013 060000 ENGINE AND ENGINE COOLING
MACK CMM 2013 060000 ENGINE AND ENGINE COOLING
MACK CXU 2013 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2013 060000 ENGINE AND ENGINE COOLING
MACK GU 2013 060000 ENGINE AND ENGINE COOLING
MACK LEU 2013 060000 ENGINE AND ENGINE COOLING
MACK LR 2013 060000 ENGINE AND ENGINE COOLING
MACK LR6 2013 060000 ENGINE AND ENGINE COOLING
MACK MRU 2013 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2013 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2013 060000 ENGINE AND ENGINE COOLING
MACK TD 2013 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU) 2013 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2013 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2013 060000 ENGINE AND ENGINE COOLING
MACK TITAN 2013 060000 ENGINE AND ENGINE COOLING
MACK TITAN (TD) 2013 060000 ENGINE AND ENGINE COOLING
MACK CHU 2012 060000 ENGINE AND ENGINE COOLING
MACK CMH 2012 060000 ENGINE AND ENGINE COOLING
MACK CMM 2012 060000 ENGINE AND ENGINE COOLING
MACK CXU 2012 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2012 060000 ENGINE AND ENGINE COOLING
MACK GU 2012 060000 ENGINE AND ENGINE COOLING
MACK LEU 2012 060000 ENGINE AND ENGINE COOLING
MACK LR 2012 060000 ENGINE AND ENGINE COOLING
MACK LR6 2012 060000 ENGINE AND ENGINE COOLING
MACK MRU 2012 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2012 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2012 060000 ENGINE AND ENGINE COOLING
MACK TD 2012 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU) 2012 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2012 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2012 060000 ENGINE AND ENGINE COOLING
MACK TITAN (TD) 2012 060000 ENGINE AND ENGINE COOLING
MACK CHU 2011 060000 ENGINE AND ENGINE COOLING
MACK CMH 2011 060000 ENGINE AND ENGINE COOLING
MACK CMM 2011 060000 ENGINE AND ENGINE COOLING
MACK CXU 2011 060000 ENGINE AND ENGINE COOLING
MACK CXU612 2011 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2011 060000 ENGINE AND ENGINE COOLING
MACK GU 2011 060000 ENGINE AND ENGINE COOLING
MACK LEU 2011 060000 ENGINE AND ENGINE COOLING
MACK LR 2011 060000 ENGINE AND ENGINE COOLING
MACK LR6 2011 060000 ENGINE AND ENGINE COOLING
MACK MRU 2011 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2011 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2011 060000 ENGINE AND ENGINE COOLING
MACK TD 2011 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2011 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2011 060000 ENGINE AND ENGINE COOLING
MACK TITAN (TD) 2011 060000 ENGINE AND ENGINE COOLING
MACK CHU 2010 060000 ENGINE AND ENGINE COOLING
MACK CHU613 2010 060000 ENGINE AND ENGINE COOLING
MACK CHU614 2010 060000 ENGINE AND ENGINE COOLING
MACK CMH 2010 060000 ENGINE AND ENGINE COOLING
MACK CMM 2010 060000 ENGINE AND ENGINE COOLING
MACK CXU 2010 060000 ENGINE AND ENGINE COOLING
MACK CXU612 2010 060000 ENGINE AND ENGINE COOLING
MACK CXU613 2010 060000 ENGINE AND ENGINE COOLING
MACK CXU613E 2010 060000 ENGINE AND ENGINE COOLING
MACK CXU614 2010 060000 ENGINE AND ENGINE COOLING
MACK GRANITE (GU) 2010 060000 ENGINE AND ENGINE COOLING
MACK GU 2010 060000 ENGINE AND ENGINE COOLING
MACK GU713 2010 060000 ENGINE AND ENGINE COOLING
MACK GU812E 2010 060000 ENGINE AND ENGINE COOLING
MACK GU813 2010 060000 ENGINE AND ENGINE COOLING
MACK GU813E 2010 060000 ENGINE AND ENGINE COOLING
MACK GU814 2010 060000 ENGINE AND ENGINE COOLING
MACK LEU 2010 060000 ENGINE AND ENGINE COOLING
MACK LR 2010 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CHU) 2010 060000 ENGINE AND ENGINE COOLING
MACK PINNACLE (CXU) 2010 060000 ENGINE AND ENGINE COOLING
MACK TD 2010 060000 ENGINE AND ENGINE COOLING
MACK TD713 2010 060000 ENGINE AND ENGINE COOLING
MACK TD714 2010 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (LEU/MRU) 2010 060000 ENGINE AND ENGINE COOLING
MACK TERRAPRO (MRU) 2010 060000 ENGINE AND ENGINE COOLING
MACK TITAN (TD) 2010 060000 ENGINE AND ENGINE COOLING
VOLVO VOLVO TRUCK 118000 ELECTRICAL SYSTEM:SOFTWARE
VOLVO VOLVO TRUCK 060000 ENGINE (PWS)

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What Should You Do?

If your vehicle is affected by this TSB, contact your authorized MACK dealer. Bring this bulletin ID (KC-538) when you visit. If under warranty, the repair should be free. If your warranty has expired, ask about goodwill coverage — manufacturers sometimes cover TSB-related repairs beyond the warranty period.

Frequently Asked Questions

A recall is a mandatory safety fix — the manufacturer must repair every affected vehicle for free. A TSB is an advisory document that describes a known issue and the recommended fix, but repairs are not required. However, some TSBs eventually lead to recalls if the issue poses a safety risk. TSBs are generally issued for quality or performance problems, while recalls address safety defects.

If your vehicle is still under the manufacturer's warranty, TSB-related repairs are typically covered at no cost. If your warranty has expired, you can ask the dealer about goodwill or customer assistance programs. Many manufacturers will cover or partially cover repairs for well-known issues, especially if the TSB was issued recently or affects a large number of vehicles.

Check the make, model, and model year listed above against your vehicle. If they match, this bulletin likely applies. However, TSBs may only affect vehicles with specific production dates, VIN ranges, or configurations. Your dealer can confirm by entering your VIN into their service system, which will show all applicable TSBs and recalls.

This data comes from the National Highway Traffic Safety Administration (NHTSA). Manufacturers are required to submit copies of all communications (including TSBs) sent to their dealers to NHTSA. The agency makes this data publicly available as part of its vehicle safety monitoring program.