Injector Circuit / IDM Codes Detected
2000-2003 Ford Excursion 7.3L V8 Power Stroke Diesel
Description
The PCM has detected fault codes from the Injector Driver Module (IDM). This is a common code on the Ford 7.3L Power Stroke diesel. The IDM operates injectors in two banks — a fault can shut down one bank, effectively making the engine run on only 4 cylinders.
Symptoms
- Check Engine Light
- Rough idle
- Engine misfires
- Loss of power
- Excessive smoke
- Engine may run on 4 cylinders only
- Stalling
Common Causes
- Faulty Injector Driver Module relay
- Loose Under Valve Cover (UVC) wiring harness connector
- Failed IDM
- Faulty fuel injector
- Damaged wiring between PCM and IDM
- Low battery voltage
Diagnostic Steps
- Check for companion injector-specific codes (P0261-P0296)
- Inspect UVC harness connectors for looseness (very common cause)
- Test IDM relay
- Check IDM power and ground circuits
- Test individual injector resistance
- Check battery voltage and charging system
Repair Notes
Check UVC harness connectors first — most common fix on 7.3L. Test IDM relay. Replace IDM if confirmed faulty.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1316 on Other Vehicles
Common Questions
What does code P1316 mean on a 2000-2003 Ford Excursion?
P1316 stands for "Injector Circuit / IDM Codes Detected". The PCM has detected fault codes from the Injector Driver Module (IDM). This is a common code on the Ford 7.3L Power Stroke diesel. The IDM operates injectors in two banks — a fault can shut down one bank, effectively making the engine run on only 4 cylinders.
What are the symptoms of P1316 on a Ford Excursion?
Common symptoms of P1316 include: Check Engine Light, Rough idle, Engine misfires, Loss of power, Excessive smoke, Engine may run on 4 cylinders only, Stalling.
What causes P1316 on a 2000-2003 Ford Excursion?
Common causes of P1316 include: Faulty Injector Driver Module relay, Loose Under Valve Cover (UVC) wiring harness connector, Failed IDM, Faulty fuel injector, Damaged wiring between PCM and IDM, Low battery voltage.