Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSBUICK2006LUCERNE V6-3.8L VIN 2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSTECHNICAL SERVICE BULLETINSCUSTOMER INTERESTA/T CONTROLS - SES/TCS LAMPS ON/DTC P1915 SET
2006 Buick Lucerne V6-3.8L VIN 2
A/T Controls - SES/TCS Lamps ON/DTC P1915 Set
2006 Buick Lucerne V6-3.8L VIN 2SECTION A/T Controls - SES/TCS Lamps ON/DTC P1915 Set
Bulletin No.: 06-07-30-035
Date: December 21, 2006
TECHNICAL
Subject:
Check Engine Light On, Traction Control System (TCS) Warning Light On, Service Traction Control Message Displayed, DTC P1915 Set (Replace Automatic Transmission Wiring Harness Assembly)
Models:
2006-2007 Buick Lucerne
2006-2007 Cadillac DTS
with 4T80-E Automatic Transaxle (RPO MH1)
Condition
Some customers may comment on one or more of the following conditions:
Check Engine Light On
Traction Control System (TCS) Warning Light On
Service Traction Control Message Displayed on DIC
Upon investigation, the technician may find DTC P1915 set as current or in history.
Cause
The cause of these conditions may be due to the transmission wiring harness being pinched between the scavenger filter and the magnet on the bottom pan, resulting in a short to ground.
Correction
Follow published diagnostics for P1915. If diagnosis leads to a grounded circuit, replace the automatic transmission wiring harness assembly. Be sure to correctly route the new harness between the scavenger filter. Relocate the magnet on the bottom pan indentations.
Parts Information
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
Date: December 21, 2006
TECHNICAL
Subject:
Check Engine Light On, Traction Control System (TCS) Warning Light On, Service Traction Control Message Displayed, DTC P1915 Set (Replace Automatic Transmission Wiring Harness Assembly)
Models:
2006-2007 Buick Lucerne
2006-2007 Cadillac DTS
with 4T80-E Automatic Transaxle (RPO MH1)
Condition
Some customers may comment on one or more of the following conditions:
Check Engine Light On
Traction Control System (TCS) Warning Light On
Service Traction Control Message Displayed on DIC
Upon investigation, the technician may find DTC P1915 set as current or in history.
Cause
The cause of these conditions may be due to the transmission wiring harness being pinched between the scavenger filter and the magnet on the bottom pan, resulting in a short to ground.
Correction
Follow published diagnostics for P1915. If diagnosis leads to a grounded circuit, replace the automatic transmission wiring harness assembly. Be sure to correctly route the new harness between the scavenger filter. Relocate the magnet on the bottom pan indentations.
Parts Information
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.