The OBD code P1399 for Honda 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 extremely serious, it can impact drivability.
A possible fix involves checking and repairing any issues with the valve clearance and EGR system components.
| 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 Honda p1399 OBD Code
The vehicle may experience rough idling, misfires, and a lack of power under acceleration.
- With Honda 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 Honda p1399 OBD Code
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P1399 in Honda indicates a random misfire detected across multiple cylinders.
- P1399 can be caused by valve clearance out of range.
- Blocked EGR (exhaust gas recirculation) passages.
Fixing Honda Error Code p1399 Step By Step
Address the issue by inspecting the ignition system components for potential faults or failures.
- To fix Honda OBDII code P1399, review the possible causes related to the code.
- Visually examine the wiring harness and connectors associated with the VTEC system.
- Ensure there are no damaged components and inspect the connector pins for any signs of being broken, bent, pushed out, or corroded.
- Check the VTEC solenoid valve for proper operation and wiring integrity.
- Clean or replace the VTEC solenoid valve if necessary.
- Perform an oil change using the manufacturer’s recommended oil viscosity.
- Reset the engine control module (ECM) to clear the fault code.
Cost Of Fixing Honda p1399 Fault Code
Diagnosing and repairing Honda P1399 may involve inspecting ignition system components for proper operation.
The cost to diagnose and fix a Honda OBD code P1399 typically ranges from $75 to $150 per hour for labor rates.
With an estimated repair time of 1. 0 hour, the total cost can be around $75 to $150, depending on shop rates and the complexity of the issue.
Details of the Honda p1399 OBD Code
P1399 in a Honda indicates a random misfire detected by the powertrain control module.
Code P1399 on a Honda means that there is 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 these misfires across different cylinders.
This code indicates a general issue with engine misfires that is not isolated to a particular cylinder.
Mechanic’s Tech Notes
For Honda code P1399, check for misfires in multiple cylinders and inspect the ignition system components.
To diagnose Honda OBDII code P1399, start by checking the ignition system components like spark plugs, ignition coils, and spark plug wires for wear or damage.
Use a voltmeter to test the ignition coil’s primary and secondary circuits for proper resistance values.
Inspect the distributor cap and rotor for signs of wear or carbon tracking.
Additionally, check the engine’s compression to ensure it’s within specifications.
A common cause of P1399 is misfires, so addressing any misfire issues can often resolve this code.
If no issues are found, consider checking the engine’s timing and the crankshaft position sensor for proper operation.
FAQ
OBD code P1399 in a Honda may be caused by valve clearance issues or blocked EGR passages. Check wiring harness, connectors, and components for damage.
Diagnose P1399 in Honda: 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 in your Honda. Address valve clearance or blocked EGR passages to prevent engine damage.
Wrap Up
If your Honda 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 Honda OBD code P1399, check the engine oil level and condition, inspect the VTEC solenoid screens for blockages, and test the VTEC pressure switch for proper operation.
