Possible Causes
| Possible Causes |
|---|
| INTERMITTENT DTC |
| (F856) 5 VOLT SUPPLY CIRCUIT SHORTED TO VOLTAGE |
| (K34) EGR SIGNAL CIRCUIT SHORTED TO VOLTAGE |
| (K34) EGR SIGNAL CIRCUIT SHORTED TO THE (F856) 5 VOLT SUPPLY CIRCUIT |
| (K34) EGR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE |
| (K900) SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE |
| EXHAUST GAS RECIRCULATION VALVE |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to *PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .