P1406 ISUZU Possible Causes
- Faulty Exhaust Gas Recirculation (EGR) valve
- Carbon blockage of the pintle
First diagnose P1406 ISUZU code
Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded terminals.
Cost of diagnosing the P1406 ISUZU code
Labor: 1.0The cost of diagnosing the P1406 ISUZU code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
When is the P1406 ISUZU code detected?The EGR pintle position was ±10% of the expected position.
P1406 ISUZU Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1406 ISUZU MeaningThe Powertrain Control Module (PCM) determines that the EGR valve is stuck open if the actual Exhaust Gas Recirculation (EGR) position and the learned closed EGR position vary by more than a predetermined value. The PCM tests for a stuck valve when the desired EGR position is at 0%. The PCM commands the EGR valve to 100% during certain driving conditions in order to clear a possible restriction from the EGR valve if the PCM determines that the valve is stuck open.
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