# Service bulletin 17\-NA\-158

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10137654
- Published by NHTSA: 2018\-05\-21
- Manufacturer's number: 17\-NA\-158
- Manufacturer's date: 2017\-05\-10
- NHTSA component: STEERING:HYDRAULIC POWER ASSIST SYSTEM

## NHTSA's summary

This informational bulletin explains to diagnose and repair the P0128 code before just replacing the power steering gear.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2017/MC-10137654-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2017/MC-10137654-0001.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Steering, Power steering

## Trouble codes named

P0128

## Vehicles listed

- 2017 CADILLAC XT5
- 2017 GMC ACADIA

## Other bulletins for the same vehicles and component

- [17\-NA\-284](/bulletins/10190273.md), 2021-04-14, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; STEERING:HYDRAULIC POWER ASSIST SYSTEM. Reduced Steering Assist Message with DTC C0460 Sym 5A Condition Some customers may comment on a Reduced Steering Assist message on the DIC with no loss of steering assist. During diagnosis a technician may find DTC C0460 Sym 5A. Cause The condition is due to Steering Angle Sensor trim error. Note: The calibration allows for an error to set without actual loss of assist. Correction Reprogram the Power Steering Control Module.
- [18NA009](/bulletins/10139248.md), 2018-06-04, Service bulletin: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE. This technical bulletin provides a procedure to replace the P/S hose, O2 sensor and engine harness if P/S fluid has been found leaking and the cause of the Mil on.
- [17NA284](/bulletins/10134582.md), 2018-04-23, Service bulletin: STEERING:HYDRAULIC POWER ASSIST SYSTEM. This technical bulletin provides a procedure to reprogram the power steering control module to correct a condition of Reduced Steering Assist Message with DTC C0460 Sym 5A due to a software abnormality.
- [PIP5545](/bulletins/10129063.md), 2018-02-21, Service bulletin: BACK OVER PREVENTION; FUEL SYSTEM, GASOLINE; STEERING:HYDRAULIC POWER ASSIST:PUMP. This Preliminary information communicates a possible noise from the water pump causing a DTC and the diagnostics for the repair.
- [PIP5516A](/bulletins/10129060.md), 2018-02-21, Service bulletin: STEERING:HYDRAULIC POWER ASSIST:POWER STEERING FLUID; POWER TRAIN; BACK OVER PREVENTION; STEERING. This Preliminary information communicates a possible power steering fluid leak above the engine harness to to the rear\( Bank 1\) heated Oxygen sensor and direction to replace all involved parts due to this contamination and leak.
- [PIC6048E](/bulletins/10098421.md), 2017-05-05, Service bulletin: STEERING:ELECTRIC POWER ASSIST SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT SOME CUSTOMERS MAY COMMENT ON THE OPERATION OF THEIR HAPTIC SEAT DURING A LANE KEEP ASSIST EVENT. LANE KEEP ASSIST WORKS DIFFERENTLY THAN LANE DEPARTURE WARNING. THE LANE KEEP ASSIST ICON IS SOLID AMBER, FORWARD CAMERA MODULE IS ACTIVELY COMMANDING A TORQUE TO ELECTRONIC POWER STEERING. THIS MEANS THAT THE DRIVER SHOULD ALSO FEEL SOME FEEDBACK FROM THE STEERING WHEEL. NO CHIMES OR HAPTIC IN THE SEAT. LANE KEEP ASSIST ICON IS FLASHING AMBER; FORWARD CAMERA MODULE IS ACTIVELY COMMANDING TORQUE TO ELECTRONIC POWER STEERING. THIS WILL ALSO BE ACCOMPANIED WITH LANE DEPARTURE WARNING CHIMES AND HAPTIC IN THE SEAT FEEDBACK BASED ON THE SETTING CHOSEN IN THE VEHICLE SETTINGS. THIS WILL TAKE PLACE WHEN THE VEHICLE HAS CROSSED LANE MARKING BY \(40 CM\) OR \(15.75 IN\).
- [PIC6048B](/bulletins/10095543.md), 2017-03-17, Service bulletin: EQUIPMENT; SEATS; STEERING:ELECTRIC POWER ASSIST SYSTEM. THIS PRELIMINARY INFORMATION COMMUNICATION ADVISES THE TECHNICIAN THAT SOME CUSTOMER MAY COMMENT ON THE OPERATION OF THEIR HAPTIC SEAT DURING A LANE KEEP ASSIST EVENT. LANE KEEP ASSIST WORKS DIFFERENTLY THAN LANE DEPARTURE WARNING. THE LANE KEEP ASSIST ICON IS SOLID AMBER, FORWARD CAMERA MODULE IS ACTIVELY COMMANDING A TORQUE TO ELECTRONIC POWER STEERING. THIS MEANS THAT THE DRIVER SHOULD ALSO FEEL SOME FEEDBACK FROM THE STEERING WHEEL. NO CHIMES OR HAPTIC IN THE SEAT. LANE KEEP ASSIST ICON IS FLASHING AMBER; FORWARD CAMERA MODULE IS ACTIVELY COMMANDING TORQUE TO ELECTRONIC POWER STEERING. THIS WILL ALSO BE ACCOMPANIED WITH LANE DEPARTURE WARNING CHIMES AND HAPTIC IN THE SEAT FEEDBACK BASED ON THE SETTING CHOSEN IN THE VEHICLE SETTINGS. THIS WILL TAKE PLACE WHEN THE VEHICLE HAS CROSSED LANE MARKING BY \(40 CM\) OR \(15.75 IN\).
- [SB\-16\-NA\-109](/bulletins/10078430.md), 2016-08-06, Service bulletin: STEERING:ELECTRIC POWER ASSIST SYSTEM. "THIS TECHNICAL BULLETIN PROVIDES A PROCEDURE TO INSPECT THE STEERING GEAR FOR A NORMAL CONDITION OF GREASE OR SEALANT ON EXTERIOR CASE OF GEAR DUE TO THE MANUFACTURING PROCESS."

JSON: [/v1/bulletins/10137654](/v1/bulletins/10137654)

[Report an error on this page](https://github.com/wenmar-pro/wenmar-open/issues/new?template=data_correction.yml&title=Data%20correction%3A%20Service%20bulletin%2017-NA-158&page=https%3A%2F%2Fopen.wenmarpro.com%2Fbulletins%2F10137654&vehicle=Service%20bulletin%2017-NA-158)