AutoCodes – Jeep – P0394 Jeep

P0394 Jeep Code - Camshaft Position Sensor Intermittent Bank 2 Sensor 2

Quick Answer

The circuits of the Camshaft Position (CMP) Sensor include a 5-Volt reference circuit supplied by the Powertrain Control Module (PCM), a low reference circuit, and an output signal circuit. Common causes include Low engine oil, Faulty Camshaft Position (CMP) Sensor, Camshaft Position Sensor harness is open or shorted. 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: P0394 Jeep indicates Camshaft Position Sensor Intermittent Bank 2 Sensor 2.
Common causes: Common causes include Low engine oil, Faulty Camshaft Position (CMP) Sensor, Camshaft Position Sensor harness is open or shorted.
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.

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Code Popularity 1,558

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 15, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0394 Jeep Description

The circuits of the Camshaft Position (CMP) Sensor include a 5-Volt reference circuit supplied by the Powertrain Control Module (PCM), a low reference circuit, and an output signal circuit. The CMP Sensor is a digital output integrated circuit sensing device that is internally magnetically biased. It detects changes in magnetic flux between the high and low points of a tone wheel connected to the camshaft. When each tooth on the tone wheel passes by the CMP Sensor, the sensor electronics use the resulting change in the magnetic field to generate a digital output pulse. The sensor produces a digital ON/OFF DC voltage pulse with a frequency that varies depending on the number of output pulses per revolution of the camshaft, corresponding to the pattern on the camshaft tone wheel. The speed of the camshaft determines the frequency of the CMP Sensor output. The PCM interprets the tooth pattern to determine the position of the camshaft. This information is then utilized to synchronize the engine's ignition timing and fuel injection events. Additionally, the PCM uses the CMP Sensor output data to ascertain the relative position of the camshaft to the Crankshaft, enabling control of the CMP Actuator if it is present.
The Diagnostic Trouble Code (DTC) will be set if, during cranking, at least 2.5 seconds have elapsed with a Crankshaft Position Sensor signal present but no Camshaft Position Sensor signal or with the engine running, the Camshaft Position Sensor signal is lost for at least 0.4 seconds with a Crankshaft Position Sensor signal present.

OBDII Code P0394 Jeep - Camshaft Position Sensor Intermittent Bank 2 Sensor 2 - AutoCodes.com — P0394 Jeep Code - Camshaft Position Sensor Intermittent Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0394 Jeep?

Low engine oil
Faulty Camshaft Position (CMP) Sensor
Camshaft Position Sensor harness is open or shorted
Camshaft Position Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)
Camshaft Tone Wheel loose/damaged or misaligned
Dead (Weak) battery

How to Fix the DTC P0394 Jeep?

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.

What does this mean?

Code Tech Notes

In the event of a failure in either the Crankshaft Position (CKP) Sensor or Camshaft Position (CMP) Sensor, the engine can still start. The Powertrain Control Module (PCM) is capable of determining the engine position and initiating startup based on one of these two inputs. However, there may be a small delay in starting as the PCM needs time to establish synchronization. If either the CKP or CMP Sensor signals are absent during engine cranking, a Diagnostic Trouble Code (DTC) is recorded, and the Malfunction Indicator Lamp (MIL) lights up.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0394 Jeep 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0394 Jeep Code

1. What are the common symptoms of OBDII code P0394 in a Jeep related to the Camshaft Position Sensor Intermittent Bank 2 Sensor 2?

The common symptoms may include rough idling, engine misfires, hesitation or stalling, and a decrease in fuel efficiency.

2. What are the potential causes of OBDII code P0394 in a Jeep indicating a Camshaft Position Sensor Intermittent Bank 2 Sensor 2 issue?

Possible causes include a faulty camshaft position sensor, wiring or connector issues, sensor alignment problems, or issues with the sensor's signal to the engine control module.

3. How can I diagnose the OBDII code P0394 in a Jeep related to the Camshaft Position Sensor Intermittent Bank 2 Sensor 2?

Diagnosis typically involves using a scan tool to read the code, testing the camshaft position sensor for proper function, inspecting wiring and connections, and checking the sensor's alignment.

4. What are the recommended repair tips for resolving OBDII code P0394 in a Jeep with a Camshaft Position Sensor Intermittent Bank 2 Sensor 2 problem?

Repair tips may include replacing the faulty camshaft position sensor, repairing any damaged wiring or connectors, ensuring proper sensor alignment, and clearing the trouble code from the vehicle's ECM.

5. Can driving with OBDII code P0394 related to the Camshaft Position Sensor Intermittent Bank 2 Sensor 2 issue cause further damage to the vehicle?

Continuing to drive with this issue may lead to poor engine performance, potential damage to other engine components, and reduced fuel efficiency. It is recommended to address the problem promptly.

6. How much does it typically cost to repair OBDII code P0394 in a Jeep due to a Camshaft Position Sensor Intermittent Bank 2 Sensor 2 fault?

The cost of repairs can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

7. How often should the Camshaft Position Sensor be replaced in a Jeep to prevent OBDII code P0394 from occurring again?

It is recommended to follow the manufacturer's maintenance schedule for sensor replacement, typically around 80,000 to 100,000 miles, to prevent recurring issues with the Camshaft Position Sensor.

8. Are there any DIY solutions for addressing OBDII code P0394 in a Jeep related to the Camshaft Position Sensor Intermittent Bank 2 Sensor 2?

While some may attempt to replace the sensor themselves, it is crucial to have the proper tools and knowledge to ensure the repair is done correctly. Professional diagnosis and repair are recommended for this issue.

9. Can a bad camshaft position sensor cause other OBDII trouble codes besides P0394 in a Jeep?

Yes, a faulty camshaft position sensor can lead to other trouble codes related to engine timing and performance issues, such as P0340 (Camshaft Position Sensor Circuit Malfunction) or P0344 (Camshaft Position Sensor Circuit Intermittent).

10. Is it safe to continue driving a Jeep with OBDII code P0394 indicating a Camshaft Position Sensor Intermittent Bank 2 Sensor 2 problem?

While the vehicle may still be operable with this issue, it is not recommended to continue driving for an extended period. Addressing the problem promptly can prevent further damage and ensure optimal engine performance.