Cadillac P1320: ICM 4X Reference Circuit No Pulses (Intermittent)

What Does The Cadillac P1320 Code Mean?

DTC P0232 and P1376 not set, engine started, engine speed over 568 rpm, and the PCM detected an interruption of the 4X Fuel Control pulses for 400 ms during the CCM test.

What Are The Potential Causes Of The Cadillac P1320 Code?

• Ignition control (4X) circuit is open, shorted to ground or to B+
• Ignition module power circuit is open (test power from DS fuse)
• Ignition module is damaged or has failed
• PCM has failed
• TSB 71-65-69 contains a repair procedure for this code

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> ENA Ignition Control Module Compatible with Cadillac
>>> GM Genuine Parts 12633238 Engine Control Module

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources

GM, 2013, Service Bullettin – Prior To Any Circuit Testing.