P1246
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Poor driveability.
Loss of performance.
Turbo position sensor, High. Performance Problem.
Fault symptoms
On-Board Diagnostics
Type of diagnosis:
Enable criteria:
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Battery voltage should be 10.2-15.8 V.
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Engine speed should be over 1700 rpm.
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Rpm changes between two measurements should not exceed a difference of 100 rpm.
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The difference between two injections should not exceed 5 mm
3
/C.
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Boost pressure control active.
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P1636 or P1637 should not be detected.
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These conditions should be fulfilled for 2 seconds before diagnostics run.
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Fault criteria:
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The VNT position is 3.5 mm higher than desired.
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Dependents:
System reaction to a fault:
OK report:
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Fault criteria not fulfilled.
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Fault handling:
(See section
Fault handling III, other emissions-related components and functions
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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Read value:
Requested VNT Position,
Actual VNT Position
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See also description of read value under
"Read Values" menu
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.
