Buick Encore: Heated oxygen and oxygen sensor caution
CAUTION: Do not remove the pigtail from either the heated oxygen sensor (HO2S) or the oxygen sensor (O2S). Removing the pigtail or the connector will affect sensor operation.
Handle the oxygen sensor carefully. Do not drop the HO2S. Keep the inline electrical connector and the louvered end free of grease, dirt, or other contaminants. Do not use cleaning solvents of any type.
Do not repair the wiring, connector or terminals. Replace the oxygen sensor if the pigtail wiring, connector, or terminal is damaged.
This external clean air reference is obtained by way of the oxygen sensor signal and heater wires. Any attempt to repair the wires, connectors, or terminals could result in the obstruction of the air reference and degraded sensor performance.
The following guidelines should be used when servicing the heated oxygen sensor:
- Do not apply contact cleaner or other materials to the sensor or vehicle harness connectors. These materials may get into the sensor causing poor performance.
- Do not damage the sensor pigtail and harness wires in such a way that the wires inside are exposed. This could provide a path for foreign materials to enter the sensor and cause performance problems.
- Ensure the sensor or vehicle lead wires are not bent sharply or kinked. Sharp bends or kinks could block the reference air path through the lead wire.
- Do not remove or defeat the oxygen sensor ground wire, where applicable. Vehicles that utilize the ground wired sensor may rely on this ground as the only ground contact to the sensor. Removal of the ground wire will cause poor engine performance.
- Ensure that the peripheral seal remains intact on the vehicle harness connector in order to prevent damage due to water intrusion. The engine harness may be repaired using Packard's Crimp and Splice Seals Terminal Repair Kit. Under no circumstances should repairs be soldered since this could result in the air reference being obstructed.
HEATED OXYGEN SENSOR RESISTANCE LEARN RESET CAUTION
CAUTION: When replacing the HO2S perform the following:
- A code clear with a scan tool, regardless of whether or not a DTC is set
- HO2S heater resistance learn reset with a scan tool, where available
Perform the above in order to reset the HO2S resistance learned value and avoid possible HO2S failure.
HVAC DUCT HEAT STAKE CAUTION
CAUTION: When separating air conditioning ducts from each other care must be given not to break or damage the hot melted (heat staked) areas of some ducts
Damaging the hot melt areas attaching the ducts to the instrument panel assembly may cause vibrations or rattling with-in the instrument panel assembly resulting in the instrument panel assembly needing to be replaced.
IGNITION OFF WHEN DISCONNECTING BATTERY CAUTION
CAUTION: Always turn the ignition OFF when connecting or disconnecting battery cables, battery chargers, or jumper cables. Failing to do so may damage the Powertrain Control Module (PCM) or other electronic components.
INSTALLING HOSES WITHOUT TWISTS OR BENDS CAUTION
CAUTION: The inlet and outlet hoses must not be twisted during installation. Do not bend or distort the inlet or outlet hoses to make installation easier. Failure to follow these procedures could result in component damage.
LIFTGATE ASSIST ROD CAUTION
CAUTION: Apply pressure only at the end of the liftgate/hood assist rod that you are removing or attaching. Do NOT apply pressure to the middle of the rod because damage or bending will result.
OXYGEN SENSOR CAUTION
CAUTION: Handle the oxygen sensors carefully in order to prevent damage to the component. Keep the electrical connector and the exhaust inlet end free of contaminants. Do not use cleaning solvents on the sensor. Do not drop or mishandle the sensor.
READ NEXT:
Power steering hose disconnected caution
CAUTION: Do not start the vehicle with any power steering gear inlet or
outlet hoses
disconnected. When disconnected, plug or cap all openings of
components. Failure to do so could result in contamin
Programming and Setup - All ASystems
Diagnostic information and procedures
CONTROL MODULE REFERENCES
Reference Information
Data Link References
Diagnostic System Check - Vehicle
Diagnostic Trouble Code (DTC) List - Vehicle
Symptoms
Repair instructions
AUDIO AMPLIFIER PROGRAMMING AND SETUP
Replace and Program Control Module or Reprogram Control Module
This control module does not require SPS programming or any setup procedures.
BODY CONTROL MODULE P
SEE MORE:
If the Off Indicator Is Lit for an Adult-Sized Occupant
If a person of adult size is sitting in
the front outboard passenger seat,
but the OFF indicator is lit, it could
be because that person is not sitting
properly in the seat. Use the
following steps to allow the system
to detect that person and enable the
front outboard passenger frontal
airbag and
Schematic wiring diagrams
DATA COMMUNICATION WIRING SCHEMATICS (ENCORE)
Power, Ground, and Low Speed GMLAN
Fig. 1: Power, Ground, and Low Speed GMLAN
High Speed GMLAN Bus (1 of 2)
Fig. 2: High Speed GMLAN Bus (1 of 2)
High Speed GMLAN Bus (2 of 2)
Fig. 3: High Speed GMLAN Bus (2 of 2)
High Speed GMLAN Bus 2
Fig. 4: H
