Peterbilt 389 Motorola CM871
Power
593 HP / 442 kW
Fuel
Diesel
Engine code
ISX 15
Version
14.9L I6
Model year(s)
2008
Control unit
Motorola CM871ECU
Protocols
- OBD2677
- Boot401
Live ECU tuning for the Peterbilt 389, with measured power and torque gains, a dyno preview, and the supported file options grouped into one focused page.
Available tuning options
Performance 2
VGT delete
Emissions & anti-pollution 4
DPF off We take no responsibility for legal actions as a result of disabling a DPF system, this may be illegal in your country. You must perform a forced regeneration or reset all DPF levels before reading the ECU. DPF must be removed after.
EGR off We take no responsibility for legal actions as a result of disabling a EGR system, this may be illegal in your country.
AdBlue / SCR off We take no responsibility for legal actions as a result of disabling a SCR / ADBLUE / DEF system, this may be illegal in your country.
DTC You must clear codes before writing tuned file.
Driveability & comfort 2
Speed limit raised We take no responsibility for legal actions as a result of a raised speed limiter, this may be illegal in your country.
Exhaust flap off
Services, files & hardware 2
Send us your ECU Includes standard bench fee processing for 1 ECU and NZ return freight. Include a send in ECU form fully filled out with your ECU.
Return file to original
Installation and process
Choose the tuning package that fits your goals, confirm the vehicle and ECU, and request your files. AltTune then guides the read, write, and verification steps for your selected vehicle — whether handled remotely with a supported flash tool or on the bench.
Support, safety, and trust
Vehicle condition, maintenance history, fuel quality, and intended use all affect results. We only publish gains we can support for the listed configuration, and we ask that you confirm suitability for your vehicle and application before ordering.
Frequently asked questions
01
Is the Peterbilt 389 Motorola CM871 supported?
This page is generated for an active vehicle in the AltTune catalogue, so it represents a currently supported tuning entry. If your exact ECU differs, contact us to confirm before ordering.
02
What options are available for this vehicle?
The resolved options for this vehicle include Send us your ECU, Tune, DPF off, EGR off, AdBlue / SCR off, Return file to original. The exact list depends on the vehicle type, fuel, and supported protocols.
03
What gains can I expect?
Exact gains depend on the selected option and the data available for this vehicle.
