The OBD code P1399 for Acura indicates a random misfire detected.
It affects the engine’s performance, leading to symptoms like engine light on, lack of power, hard starting, and hesitation.
Common causes include valve clearance out of range and blocked EGR passages.
While not severe, it can impact drivability.
A possible fix involves inspecting wiring harness, connectors, and related components for damage or corrosion.
| Repair Importance Level | 10.0 (Out of 10) |
| Estimated Repair Time | Approximately 1.0 hour |
| Repair Difficulty Level | 10.0 (Out of 10) |
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Symptoms of the Acura p1399 OBD Code
The vehicle may experience rough idling, misfires, and a lack of power under acceleration.
- With Acura OBD code P1399, the Engine Light will be ON.
- Lack/loss of power may be experienced.
- Hard start can occur.
- Engine hesitation might be noticeable.
Causes of the Acura p1399 OBD Code
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P1399 in Acura indicates multiple misfires detected without a specific cylinder identified.
- P1399 can be caused by valve clearance out of range.
- Blocked EGR (exhaust gas recirculation) passages.
Fixing Acura Error Code p1399 Step By Step
Address the issue by inspecting the ignition system components for potential faults or failures.
- To fix Acura OBDII code P1399, first, review the possible causes related to this code.
- Visually examine the wiring harness and connectors associated with the VTEC system.
- Check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.
- Ensure the VTEC solenoid and pressure switch are functioning correctly.
- Clean or replace the VTEC solenoid filter if clogged.
- Check the engine oil level and quality, as low oil levels or dirty oil can trigger this code.
- Perform an oil change if necessary.
- Reset the ECU by disconnecting the battery for a few minutes or using a scan tool.
- If the issue persists, consider replacing the VTEC solenoid or pressure switch as needed.
Cost Of Fixing Acura p1399 Fault Code
The repair for Acura P1399 may involve diagnosing and fixing issues with the Variable Valve Timing system.
The cost to diagnose and fix the Acura OBD code P1399 depends on the estimated repair time of 1. 0 hour.
Labor rates typically range from $75 to $150 per hour, so the general cost could be between $75 and $150. Actual cost may vary based on shop rates and the complexity of the repair.
Details of the Acura p1399 OBD Code
Fault code P1399 in Acura indicates a random misfire detected in multiple cylinders.
Acura OBD code P1399 indicates a random misfire detected.
This code is triggered by the Engine Control Module (ECM) when it detects misfires occurring in multiple cylinders without a specific pattern.
The ECM monitors crankshaft speed fluctuations to identify misfires across different cylinders, leading to the setting of code P1399. This code typically points to a general engine misfire issue that may be caused by various factors such as ignition system problems, fuel delivery issues, vacuum leaks, or even mechanical engine problems.
Mechanic’s Tech Notes
Detailed information on Acura fault code P1399, related to the Variable Valve Timing Control System Malfunction.
To diagnose and fix OBDII code P1399 on an Acura, start by checking the Transmission Control Module (TCM) power and ground using a multimeter.
Verify TCM communication over the Controller Area Network (CAN) using a scan tool.
If communication issues are detected, reprogramming or reflashing the TCM may be necessary.
Additionally, visually inspect the wiring harness and connectors for any damage, and ensure connector pins are not broken, bent, pushed out, or corroded.
This thorough inspection can help identify and resolve the underlying cause of the P1399 fault code.
FAQ
Common causes of OBD code P1399 in an Acura: Valve clearance out of range, blocked EGR passages. Fix: Check wiring, connectors for damage, inspect pins for issues.
Diagnose P1399 in Acura: Symptoms Engine Light ON, lack of power, hard start, hesitation. Causes Valve clearance, blocked EGR. Fix Inspect wiring, connectors for damage.
It is not safe to continue driving with OBD code P1399. Address the valve clearance or blocked EGR passages to prevent engine damage.
Wrap Up
If your Acura is displaying OBD code P1399, you may experience rough idling, misfires, or a lack of power.
This code is often caused by issues with the Variable Valve Timing and Lift Electronic Control (VTEC) system, such as clogged VTEC solenoid screens, low engine oil levels, or a faulty VTEC pressure switch.
To address Acura OBD code P1399, check the engine oil level and quality, inspect the VTEC solenoid screens for blockages, and test the VTEC pressure switch for proper
