P1398 Dodge Code - Misfire Adaptive Numerator At Limit Condition
Quick Answer
With the engine running, the Powertrain Control Module (PCM) detects that the Actual Crankshaft Position (CKP) sensor signal level disagreed with the Expected CKP sensor signal level. Common causes include Faulty Crankshaft Position (CKP) Sensor, Crankshaft Position (CKP) Sensor harness is open or shorted, Crankshaft Position (CKP) Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1398 Dodge indicates Misfire Adaptive Numerator At Limit Condition.
- Common causes
- Common causes include Faulty Crankshaft Position (CKP) Sensor, Crankshaft Position (CKP) Sensor harness is open or shorted, Crankshaft Position (CKP) Sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1398 Dodge Description
What are the Possible Causes of the DTC P1398 Dodge?
- Faulty Crankshaft Position (CKP) Sensor
- Crankshaft Position (CKP) Sensor harness is open or shorted
- Crankshaft Position (CKP) Sensor circuit poor electrical connection
- Low cylinder compression
How to Fix the DTC P1398 Dodge?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
1996-1997 Ram Van
1996-1997 Dakota
1996-1997 Ram Truck
NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A GASOLINE ENGINE.
SYMPTOM/CONDITION:
A customer may experience a MIL (Check Engine Lamp) illumination due to an erroneous DTC P1398 - No Crank Sensor Learn. This DTC may also be displayed as a $BA - Adaptive Numerator at Limit. This condition may be caused by a momentary drop in the supply voltage to the powertrain control module.
This condition may occur when a normal, or higher, electrical load is applied to the battery. A momentary drop in the supply voltage to the PCM may be caused by a marginal battery or poor electrical connections from the battery to the PCM. The condition may be further aggravated by cold ambient temperatures or when the vehicle has been left unused for an extended period of time.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1398 Dodge code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1398 Dodge Code
1. What does OBDII code P1398 in a Dodge indicate?
The P1398 code specifically points to a Misfire Adaptive Numerator At Limit Condition in a Dodge vehicle.
2. What are the common symptoms of OBDII code P1398 in a Dodge?
Common symptoms of code P1398 include rough idling, engine misfires, decreased fuel efficiency, and possible stalling.
3. What are the possible causes of OBDII code P1398 in a Dodge?
Potential causes of code P1398 include faulty ignition coils, spark plugs, fuel injectors, vacuum leaks, or issues with the engine's compression.
4. How can I diagnose OBDII code P1398 in my Dodge?
Diagnosing code P1398 typically involves performing a thorough inspection of the ignition system, fuel system, and checking for any vacuum leaks or compression issues.
5. How can I repair OBDII code P1398 in my Dodge?
Repairing code P1398 may involve replacing faulty ignition components, such as coils or spark plugs, addressing fuel injector issues, fixing vacuum leaks, or resolving any compression problems.
6. Can driving with OBDII code P1398 in a Dodge cause further damage?
Continued driving with code P1398 present can potentially lead to more severe engine issues over time, so it's best to address the problem promptly.
7. Will resetting the OBDII code P1398 in my Dodge make it go away?
Resetting the code may temporarily clear the warning light, but if the underlying issue causing P1398 is not addressed, the code is likely to reappear.
8. How much does it typically cost to repair OBDII code P1398 in a Dodge?
The cost of repairing code P1398 can vary depending on the exact cause of the issue, but it is advisable to consult a mechanic for an accurate diagnosis and cost estimate.
9. Can I continue driving my Dodge with OBDII code P1398?
While it may be possible to drive with code P1398 present, it is advisable to have the issue diagnosed and repaired as soon as possible to prevent further damage and ensure optimal engine performance.
10. How can I prevent OBDII code P1398 from appearing in my Dodge in the future?
Regular maintenance, such as changing spark plugs and ignition components at recommended intervals, keeping up with fuel system cleanings, and addressing any engine issues promptly, can help prevent code P1398 from reoccurring.
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