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Possible Causes

Possible Causes 
INTERMITTENT DTC
(F856) 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K34) EGR SIGNAL CIRCUIT SHORTED TO GROUND
(F856) 5 VOLT SUPPLY CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
(K34) EGR SIGNAL CIRCUIT SHORTED TO (K900) SENSOR GROUND CIRCUIT
(F856) 5 VOLT SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE
(K34) EGR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
EXHAUST GAS RECIRCULATION VALVE
POWERTRAIN CONTROL MODULE (PCM)

Perform *PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

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