SW1 L4-1.9L SOHC VIN 8 (1996)
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If commanded position is greater than 80%, actual position must be within 26 counts (10% [0.5 volts]) of commanded.
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If commanded position is less than 80%, actual position must be within 60 counts (24% [1.1 volts]) of commanded.
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Two consecutive ignition cycles while the diagnostic runs with an active fault.
DTC P0404 will set if either condition exists for greater than 10 seconds.
When either one of these tests have failed, a DTC will set and EGR will be disabled for that ignition cycle. The malfunction history record will indicate
which one of these tests has failed to aid in diagnostics.
IMPORTANT:
The EGR position error is continuously checked when the EGR is commanded On.
IMPORTANT:
The EGR valve may operate at any engine coolant temperature regardless of loop mode.
IMPORTANT:
When this DTC sets, some EGR functions will be disabled for the duration of that ignition cycle. When repairs are complete, codes must be cleared
and ignition keyed off for at least 10 seconds to allow proper operation.
DIAGNOSTIC AIDS
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Check for backed out or damaged terminals.
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Check the tightness of the female terminal grip with a spare male terminal.
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Check for B + voltage at the E terminal on the EGR valve when the ignition is On.
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Check EGR 10-amp fuse in the UHJB before diagnosing this DTC.
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Carbon buildup around the pintle valve may restrict pintle movement.
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An open in the PCM diode feedback circuit will result in unstable valve operation resulting in vehicle surge.
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Due to moisture associated with the exhaust system, the EGR valve may freeze and stick in extreme cold ambient conditions.
EGR - Voltage Our of Range - Open/Short
