Ignition Ground Circuit
Table of contents
P1376 BUICK Possible Causes
- Faulty Ignition Control Module
- Ignition Control Module harness is open or shorted
- Ignition Control Module circuit poor electrical connection
How do I fix code P1376 BUICK?
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 connector’s pins.
Cost of diagnosing the P1376 BUICK code
The cost of diagnosing the P1376 BUICK code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
When is the code detected
If the Ref Lo input voltage goes too high or low, the P1376 code will set.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1376 BUICK Description
The PCM applies 2.5 volts on the Reference Low (Ref Lo) Voltage circuit to the Ignition Control Module. Ref Lo Voltage to the Powertrain Control Module (PCM) represents the voltage difference between Ref Lo and the PCM power ground. This is needed to ensure that the PCM and Ignition Control (IC) Module signals all have the same ground reference.