Fault in the ABS or wheel speed sensor circuit or its signal to the engine control module; Damaged wiring or poor connections at wheel speed sensors or the crankshaft position sensor; Crankshaft position sensor fault or damaged reluctor wheel giving a poor signal; Genuine engine misfire from worn spark plugs, failing ignition coils or injector problems; Communication fault between the ABS module and engine control module on the vehicle network; Outdated or faulty engine control module software.

P1380

Misfire Detected Rough Road Data Not Available.

Cadillac
Powertrain
Manufacturer code
Medium severity

How this code is built

P: SystemPowertrain
1: Defined byThe manufacturer
3: AreaIgnition system or misfire
80: FaultThe specific fault in that area

What it means

On Cadillac, P1380 means the engine control module detected a misfire but could not rely on the rough road data used to tell real misfires from crankshaft speed disturbances caused by bumpy surfaces. The misfire monitor depends on the crankshaft position signal and, on many models, ABS wheel speed data to judge road roughness. When that data is missing or implausible, the module sets this code. Exact data sources vary by model and year.

Symptoms

Check engine light on
Rough running or hesitation, particularly on uneven roads
Intermittent misfire or juddering under load
ABS or traction control warning lights on at the same time
Slightly reduced fuel economy

Possible causes

Fault in the ABS or wheel speed sensor circuit or its signal to the engine control modulelikely
Damaged wiring or poor connections at wheel speed sensors or the crankshaft position sensorlikely
Crankshaft position sensor fault or damaged reluctor wheel giving a poor signalpossible
Genuine engine misfire from worn spark plugs, failing ignition coils or injector problemspossible
Communication fault between the ABS module and engine control module on the vehicle networkpossible
Outdated or faulty engine control module softwarerare

How to diagnose

Read all stored and pending codes and note any ABS, wheel speed, crankshaft sensor or network codes alongside P1380
Review freeze frame data to see engine speed, load and vehicle speed when the code set
Check live data for wheel speed readings from all four wheels and compare them while driving slowly
Visually inspect wheel speed sensor wiring, connectors and the crankshaft sensor connector for damage, corrosion or chafing
Inspect spark plugs and ignition coils, and check misfire counters per cylinder to rule out a real misfire
Test wheel speed and crankshaft sensor signals and circuit resistance against the manufacturer's specification for the model
Check the vehicle network for communication faults between the ABS and engine modules
Check whether a software update is available for the engine control module for your model and year

How to fix

Repair or replace damaged wiring or connectors in the wheel speed sensor or crankshaft sensor circuits
Replace a faulty wheel speed sensor or crankshaft position sensor, and check the reluctor ring
Repair the underlying ABS fault so valid wheel speed data reaches the engine module
Replace worn spark plugs or faulty ignition coils if a real misfire is found
Repair network wiring faults, or update the control module software if a known software fault applies

Can I keep driving?

Medium severity

The car can usually be driven carefully for a short time, but get it checked soon. If the engine is misfiring noticeably or the check engine light flashes, reduce load and stop driving to avoid damaging the catalytic converter.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.