Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / P1380 — Misfire Detected Rough Road Data Not Available

P1380 — Misfire Detected Rough Road Data Not Available

Detailed page for trouble code P1380.

34,405codes
59brands
11,914generic
22,491specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

P1380

CHEVROLET P — Powertrain

Misfire Detected Rough Road Data Not Available

Brand: CHEVROLET
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Missing or invalid accelerometer/IMU (vertical/vibration) data
  • Faulty or intermittent wheel speed/ABS sensor signals
  • Damaged or corroded wiring or connectors to sensors or PCM
  • ECM/PCM software fault or unexpected data format
  • Battery/charging system low voltage during data capture
  • Disabled or misconfigured diagnostic parameter(s)

Symptoms

  • Malfunction Indicator Lamp (MIL) illuminated
  • Stored misfire-related data with note that rough‑road comparison data unavailable
  • Intermittent or false misfire codes or adaptive learning failures
  • Possible drivability complaints (stumble or rough idle) if an actual misfire exists
  • No consistent correlation between rough road and recorded misfire counts

What to check

  • Read freeze frame and full DTC list with a capable scan tool; note PIDs and timestamps
  • Check availability of rough‑road related PIDs (acceleration/IMU, wheel speed inputs, misfire counters)
  • Inspect battery voltage and charging system for adequate voltage during fault events
  • Visual inspection of connectors and wiring to accelerometer/ABS sensors and PCM for damage or corrosion
  • Check CAN/serial bus for other communication errors
  • Attempt to reproduce condition on both smooth and rough surfaces while monitoring real‑time PIDs

Signal parameters

  • Misfire counters (cyl 1–8) — expected: 0 or low counts during normal operation
  • Crankshaft Position Sensor (CKP) — square wave RPM signal, stable with engine speed
  • Camshaft Position Sensor (CMP) — present and stable with CKP
  • Wheel speed sensors (FL/FR/RL/RR) — consistent vehicle speed readings
  • Vertical/lateral acceleration (IMU) or body vibration sensor — provides rough‑road magnitude (m/s² or g)
  • Vehicle speed (VSS) — matches wheel speeds and scan tool

Diagnostic algorithm

  1. Retrieve DTCs and freeze-frame; note related codes that indicate sensor or communication faults.
  2. With a scan tool, monitor live PIDs: misfire counts, CKP/CMP signals, wheel speeds, accelerator/IMU data and vehicle speed. Confirm whether the 'rough‑road' acceleration PID is present and updating.
  3. Verify battery voltage and charging system; low voltage can cause data loss. Repair charging/battery issues first.
  4. Visually inspect and secure connectors, grounds, and wiring for IMU/accelerometer, ABS wheel speed sensors and PCM. Repair any damaged wiring or corroded connectors.
  5. If rough‑road PID is missing or erratic, test the IMU/accelerometer per factory procedure (voltage, signal continuity, self‑test flags). Replace sensor if out of spec.
  6. Check ABS wheel speed sensors for correct AC or digital signal and compare wheel speeds on smooth vs. rough surfaces. Replace faulty wheel speed sensors or tone rings as needed.
  7. Clear codes and attempt to re-create the original condition (drive over same rough surface) while logging PIDs. Confirm rough‑road data is present and misfire event can be validated.
  8. If rough‑road data is present but misfires persist, proceed with standard misfire diagnosis: inspect spark plugs, ignition coils, fuel injectors, fuel pressure, and perform compression/leak-down tests.
  9. If communication faults appear (CAN errors, module comms), diagnose bus wiring, module grounds and perform module reflash if directed by OEM service info.
  10. After repairs, erase codes, perform a drive cycle and verify code does not return.

Likely causes

  • Faulty or disconnected vertical-acceleration/IMU sensor used for rough‑road detection
  • Intermittent or missing wheel speed inputs (ABS speed sensors) impairing rough‑road algorithms
  • Poor ground or power to sensor/PCM causing data dropouts
  • Connector corrosion or broken wiring at sensor or PCM

Fault status

⚠️ Status
PCM detected a misfire event but could not obtain or validate the rough‑road sensor data (acceleration/IMU or wheel speed inputs) needed for the rough‑road misfire algorithm. Diagnostic confirmation of misfire is incomplete.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-3.0 hours

Similar codes

P0300 P0301 P0302 P0316 P1491 U0422
456

Browse 456 CHEVROLET manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

CHEVROLET

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .