P0338 Infiniti Code - Crankshaft Position Sensor 'A' Circuit High
Quick Answer
The Crankshaft position sensor also known as the crank position sensor is an electronic device used in an engine to record the rate at which the crankshaft is spinning. Common causes include Faulty crankshaft position sensor, Crankshaft position sensor harness is open or shorted, Crankshaft position 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
- P0338 Infiniti indicates Crankshaft Position Sensor 'A' Circuit High .
- Common causes
- Common causes include Faulty crankshaft position sensor, Crankshaft position sensor harness is open or shorted, Crankshaft position 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 P0338 Infiniti Description
When the engine is running, the high and low parts of the teeth cause the gap with the sensor to change. The changing gap causes the magnetic field near the sensor to change. The change in the magnetic field cause the voltage from the sensor to change.
What are the Possible Causes of the DTC P0338 Infiniti?
- Faulty crankshaft position sensor
- Crankshaft position sensor harness is open or shorted
- Crankshaft position sensor circuit poor electrical connection
- Signal plate may be damage
- Starter motor may be faulty
- Starting system circuit
- Dead or weak battery
How to Fix the DTC P0338 Infiniti?
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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0338 Infiniti 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 P0338 Infiniti Code
1. What are the common symptoms of OBDII code P0338 in an Infiniti?
The common symptoms include engine misfires, rough idling, stalling, difficulty starting the engine, and a decrease in fuel efficiency.
2. What could cause the OBDII code P0338 to trigger in an Infiniti?
The most common cause of P0338 is a faulty crankshaft position sensor, damaged wiring or connectors related to the sensor, or a problem with the engine control module (ECM).
3. How does a high circuit signal from the crankshaft position sensor affect an Infiniti vehicle?
A high circuit signal from the crankshaft position sensor can disrupt the engine's timing, leading to performance issues, rough running, and potential engine damage if not addressed promptly.
4. Can a DIY enthusiast repair OBDII code P0338 in an Infiniti?
While some enthusiasts might be able to replace the crankshaft position sensor themselves, diagnosing the issue accurately usually requires professional diagnostic equipment to ensure a correct repair.
5. How crucial is it to address OBDII code P0338 promptly in an Infiniti?
It is important to address P0338 promptly to prevent potential engine damage and avoid safety hazards on the road due to engine stalling or poor performance.
6. Are there any preventive measures to avoid encountering OBDII code P0338 in an Infiniti?
Regular maintenance, including checking the condition of the crankshaft position sensor and related components, can help prevent the occurrence of P0338 in an Infiniti.
7. Is it safe to continue driving an Infiniti with OBDII code P0338 present?
It is not recommended to drive the vehicle with code P0338 present, as it can lead to unpredictable engine behavior and potentially worsen the issue over time.
8. How can a mechanic diagnose OBDII code P0338 in an Infiniti?
A mechanic can diagnose P0338 using a scan tool to read the fault code and further testing to check the crankshaft position sensor's functionality and the circuit for any faults.
9. What is the typical cost to repair OBDII code P0338 in an Infiniti?
The cost of repairing P0338 can vary depending on the exact cause of the issue, but it generally involves replacing the crankshaft position sensor or repairing related wiring, which can range from $100 to $300 or more.
10. Can resetting the OBDII system clear code P0338 in an Infiniti?
Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing P0338 is not addressed, the code is likely to reappear once the problem resurfaces.
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