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04-270 DIAGNOSTICS - ENGINE CONTROL SYSTEM
P1691-POSTPROCESSING DIESEL OXIDATION CONVERTER
SYSTEM EFFICIENCY - DATA IS VALID BUT BELOW NORMAL
OPERATING RANGE - MEDIUM SEVERITY LEVEL
Description
04 1 . The postprocessing system is monitored by three temperature sensors in the
exhaust system.The postprocessing DOC inlet temperature sensor is located
behind the turbocharger outlet and at the inlet of the postprocessing system.
The postprocessing DPF inlet temperature sensor is located between the
postprocessing catalyst and the postprocessing DPF.The postprocessing DPF
outlet temperature sensor is located behind the postprocessing DPF. During
the active regeneration of the postprocessing system, a temperature sensor
around the postprocessing DOC is used to monitor the temperature difference
between the two ends of the catalyst.
Circuit Diagram
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