Chevrolet P1374: IC Module 3X Reference Circuit Malfunction
Is your scanner showing Chevrolet P1374?
No worries. We'll show you what it means and how to deal with it.
Chevrolet P1374: IC Module 3X Reference Circuit Malfunction
OVERVIEWWhat Does The Chevrolet P1374 Code Mean?
Engine runtime over 3 seconds, and the PCM detected the ratio of 18X pulses received equaled 36:1, and the ratio of 18X REF pulses to 3X pulses did not equal 6:1 for 30 seconds.
What Are The Potential Causes Of The Chevrolet P1374 Code?
- IC 3X signal wire routed close to Generator, spark plug wires or EMI/RFI interference
- IC 3X signal circuit is open, shorted to ground or shorted to B+
- IC module is damaged or has failed
- PCM has failed
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> GM Genuine Parts 12633238 Engine Control Module
>>> Standard Motor Products LX340T Ignition Module Control Unit, Assorted, One Size
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
- 2000 Chevrolet Camaro and Pontiac Firebird Service Manual – Volume 1, page 1119.
- GM, 2013, Service Bullettin – Prior To Any Circuit Testing.
