P0402 , P0403
Read the instructions below then
start the fault diagnostic procedure.
Symptom: Check Engine on. Poor performance.
P0402
EGR Flow Too High
P0403
EGR Flow Too Low
Fault symptom
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Check Engine on. Poor performance.
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Conditions
The following conditions apply for the DTC in question:
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P0402:
The exhaust gas flow through the EGR valve is so high that a control deviation of more than 75 mg air/combustion has been present for more than 6 seconds.
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P0403:
The exhaust gas flow through the EGR valve has been so low that a control deviation of more than 75 mg air/combustion has been present for more than 6 seconds.
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Diagnostic help
This DTC indicates a mechanical malfunction or vacuum malfunction. A leak anywhere in the circuit can generate this DTC.
