P1141

Read the instructions below then start the fault diagnostic procedure.

Symptom: CHECK ENGINE.

P1141

Fault symptoms

•	CHECK ENGINE.

On-Board Diagnostics

Type of diagnosis:

-	Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.

Enable criteria:

-	General condition for this diagnostic trouble code: Atmospheric pressure must exceed 72 kPa as well as coolant and intake air temperature must exceed -7°C.

-	Test 1: Engine running. Main relay voltage exceeding 10V. Pre-heating not active.

-	Test 2: Engine running. Main relay voltage exceeding 10V. Pre-heating active.

Fault criteria:

-	Test 1: Output voltage below 2V for more than 5 s.

-	Test 2: Current below 300 mA for more than 5 s.

Dependents:

-	P1641, P1654 and P1655.

System reaction to a fault:

-	Oxygen sensor affect on closed loop zeroed.

OK report:

-	Enable criteria fulfilled. Fault criteria for P1141 or P1142 not fulfilled within 60 s.

Fault handling: (For more information, see .)

-

Type III.

Diagnostic help

Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.

Functions in the diagnostic tool related to the fault:

•	Diagnostic status for the diagnosis.

•	Activate output for pre-heating.

•	Oxygen sensor pre-heating current, unit mA.

For information, see .

Checking the wiring

Jiggle the wiring harness at several points and in different directions to detect intermittent breaks and short circuits. Observe the multimeter, diagnostic tool or test lamp during the check.