P1141
Read the instructions below then
start the fault diagnostic procedure.
Symptom: CHECK ENGINE.
O2S Heater Circuit. Current too Low, Sensor 2.
Fault symptoms
On-Board Diagnostics
Type of diagnosis:
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Continuous. But interrupted when fault criteria fulfilled and will not restart until next driving cycle.
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Enable criteria:
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General conditions for this trouble code: When starting the engine, the atmospheric pressure must exceed 78 kPa and the engine coolant and intake air temperatures must exceed -7°C.
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Test 1: Engine running. Main relay voltage exceeding 10V. Pre-heating not active.
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Test 2: Engine running. Main relay voltage exceeding 10V. Pre-heating active.
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Fault criteria:
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Test 1: Output voltage below 2V for more than 5 s.
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Test 2: Current below 500 mA for more than 5 s.
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Dependents:
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P1641, P1654 and P1655.
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System reaction to a fault:
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Oxygen sensor affect on closed loop zeroed.
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OK report:
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Enable criteria fulfilled. Fault criteria for P1141 or P1142 not fulfilled within 60 s.
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Fault handling:
(See “Fault diagnosis, general” for more information.)
Diagnostic help
Fault diagnosis concerns an electrical fault in connecting leads or in the sensor.
Functions in the diagnostic tool related to the fault:
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Diagnostic status for the diagnosis.
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Activate output for pre-heating.
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Oxygen sensor pre-heating current, unit mA.
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See also the description of activations under ”Fault diagnosis, general” for more information.
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.
