Back to 2013 Cadillac ATS
Help

2013 CADILLAC ATS

2.0L Turbo I4•RWD•AUTOMATIC•gas•turbo
6 active safety recalls on this vehicle — view recalls
Founding sponsor spot is openYour name on every procedure for this vehicle, permanently.Sponsor — $99 →
Repairs0Labor566Torque4710Fluid7DTC952Battery0Maintenance0Recalls6
P1320high severityPowertrain

IC Module 4X Reference Circuit Intermittent No Pulses

on 2013 Cadillac ATS 2.0L Turbo I4 · RWD

What this code means

The PCM detected intermittent loss of the 4X reference signal from the ignition control module. The 4X reference provides crankshaft position timing information for spark delivery.

Symptoms

  • Check Engine Light
  • Intermittent misfires
  • Engine stalling
  • No start (intermittent)
  • Rough running

Common causes

  • Faulty crankshaft position sensor
  • Damaged 4X reference signal wiring
  • Ignition control module failure
  • Loose distributor (older engines)
  • Corroded connector

Diagnostic steps

  1. Scope 4X reference signal
  2. Test crankshaft position sensor
  3. Inspect wiring for damage
  4. Check IC module connections
  5. Test distributor pickup (if equipped)

Repair notes

Check crankshaft position sensor and wiring. Replace IC module if signal is intermittent at module.

Other Powertrain codes on this vehicle

⚠ STILL BEHIND THE PAYWALL
The 2013 Cadillac ATS repair data is incomplete because no one has sponsored it yet. For $99, we generate the full step-by-step procedures, then fact-check them with a second AI pass and your expert review. Your name on every procedure, permanently.
The same data would cost $169/mo from Mitchell1 or $30/year from ALLDATAdiy — and you'd be renting access, not freeing it. Sponsor once, free forever.
Sponsor the Cadillac ATS — $99 →
Building an app?
Free API access to all this data — 50 requests/day, no card required.
Get an API key →
Run a shop?
Manage repairs, estimates, and customers with ShopBase — $249/mo, all features included.
Try ShopBase →