SsangYong Musso. Manual - part 149

1F-180  ENGINE CONTROLS

SSANGYONG  Y158

DIAGNOSTIC TROUBLE CODE (DTC) P0141-95

O2 BANK 1 SENSOR 2 HEATER SHORT CIRCUIT TO

GROUND OR OPEN

Circuit Description

In order to control emissions, a catalytic converter is
used to convert harmful emissions into harmless water
vapor and carbon dioxide.

The Engine Control Module (ECM) has the ability to
monitor this process by using a Heated Oxygen Sensor
(O2S 2). The O2S 2 produces an output signal which
indicates the storage capacity of the catalyst. This in
turn indicates the catalyst’s ability to convert exhaust
emissions effectively.

If the O2S 2 pigtail wiring, connector, or terminal is
damaged, the entire O2S 2 assembly must be replaced.
Do not attempt to repair the wiring, connector, or
terminals. In order for the sensor to function properly, it
must have a clean air reference provided to it. This clean
air reference is obtained by way of the O2S 2 wire(s).

Any attempt to repair the wires, connector, or terminal
and degrade the O2S 2 performance.

Conditions for Setting the DTC

•••••

O2S 2 voltage is less than 2 volts for ground.

•••••

O2S 2 voltage is less than 3 volts for open.

•••••

Output stage is inactive.

Action Taken When the DTC Sets

•••••

The Malfunction Indicator Lamp (MIL) will illuminate
after two consecutive driving cycles in which the diag-
nostic runs with the fault active.

•••••

The ECM will record operating conditions at the time
the diagnostic fails. This information will be stored in
the Freeze Frame and Failure Records buffers.

•••••

A history DTC is stored.

Conditions for Clearing the MIL/DTC

•••••

The MIL will turn off after three consecutive driving
cycles in which the diagnostic runs without a fault.

•••••

A history DTC will clear after 40 consecutive warm-
up cycles without a fault.

•••••

The DTC(s) can be cleared by using the scan tool.

Diagnostic Aids

Check for the following conditions:

An intermittent may be caused by rubbed-through wire
insulation or a wire contacting the exhaust.

Check for a poor connection or a damaged harness and
inspect the harness connectors for the following condi-
tions:

•••••

improper mating

•••••

Broken locks

•••••

Improperly formed

•••••

Damaged terminals

•••••

Poor terminal-to-wire connection

•••••

Damaged harness

YAB1F140

ENGINE CONTROLS  1F-181

SSANGYONG  Y158

1

Step

Action

Value(s)

Yes

No

DTC P0141-95 O2 Bank 1 Sensor 2 Heater Short Circuit to Ground or Open

-

 Go to Step 2

Go to “Euro

On-Board

Diagnostic

System Check”

2

3

4

-

 Go to Step 10

Go to Step 6

-

 Go to Step 10

Go to Step 7

-

 Go to Step 10

-

5

6

7

8

Perform an Euro On-Board Diagnostic (EOBD) System
Check.
Is the system check complete?

1. Turn the ignition ON, with the engine OFF.
2. Install a scan tool.
3. Operate the vehicle within the Freeze Frame

Conditions for Setting the DTC as noted.

Does the heater ampere within the specified value?
1. Turn the ignition OFF.
2. Disconnect the O2S 2 electrical connector.
3. Turn the ignition ON.
4. With a test light connected to B+, probe the O2S 2

electrical connector, terminal 3.

Does the test light illuminate?
1. Check an open or short to ground in wiring between

the Over Voltage Protection Relay (OVPR) electrical
connector, terminal 2 and O2S 2 electrical
connector, terminal 3.

2. Repair as necessary.
Is the repair complete?
Check the poor connection at the OVPR connector
terminal 2 and O2S 2 electrical connector, terminal 3.
Did the terminal require replacement?
1. Check an open or short to ground in wiring between

the O2S 2 electrical connector, terminal 4 and O2S 2
ground circuit, terminal 7.

2. Repair as necessary.
Is the repair complete?
Check the poor connection at the O2S 2 connector
terminal 4 and O2S 2 ground circuit, terminal 7.
Did the terminal require replacement?
Replace the O2S 2.
Is the repair complete?
1. Turn the ignition switch OFF.
2. Replace the ECM.

Is the repair complete?

-

 Go to Step 10

Go to Step 5

-

 Go to Step 10

 Go to Step 9

-

 Go to Step 10

-

Test Description

Number(s) below refer to the step number(s) on the
Diagnostic Table.

1. The Euro On-Board Diagnostic (EOBD) System

Check prompts the technician to complete some
basic checks and store the freeze frame and failure

records data on the scan tool if applicable. This
creates an electronic copy of the data taken when
the malfunction occurred. The information is then
stored on the scan tool for later reference.

4. This step checks for an open or shorted.

-

 Go to Step 4

Go to

“Diagnostic

Aids”

9

0.2 - 2.0 amps

 Go to Step 3

Go to Step 8

1F-182  ENGINE CONTROLS

SSANGYONG  Y158

10

Step

Action

Value(s)

Yes

No

11

1. Using the scan tool, clear the Diagnostic Trouble

Codes (DTCs).

2. Start the engine and idle at normal operating

temperature.

3. Operate the vehicle within the Conditions for setting

this DTC as specified in the supporting text.

Does the scan tool indicate that this diagnostic has ran
and passed?
Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?

-

 Go to Step 11

 Go to Step 2

DTC P0141-95 O2 Bank 1 Sensor 2 Heater Short Circuit to Ground or Open (Cont'd)

-

Go to

applicable

DTC table

System OK

ENGINE CONTROLS  1F-183

SSANGYONG  Y158

BLANK