Cadillac P1222: Injector Control Circuit Malfunction (Intermittent)

Is your scanner showing Cadillac P1222?
No worries. We'll show you what it means and how to deal with it.

Presented by
Randy Worner

Cadillac P1222: Injector Control Circuit Malfunction (Intermittent)

OVERVIEW
Severity
:
High
DIY Difficulty Level
:
Intermediate
Repair Cost
:
$350-$850
Can I Still Drive?
:
No

What Does The Cadillac P1222 Code Mean?

Engine started, system voltage over 10.0v, and the PCM detected an unexpected voltage value on an injector driver circuit for 500 ms.

What Are The Potential Causes Of The Cadillac P1222 Code?

  • Fuel injector control circuit is open (an intermittent fault)
  • Fuel injector control circuit shorted to ground (intermittent fault)
  • Fuel injector power circuit is open (test the INJ 1, INJ 2 fuses)
  • Fuel injector 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:

>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> JDMON Compatible with Fuel Injectors
>>> 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.

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