AutoCodes – Buick – P055D Buick

P055D Buick Code - Intake Camshaft Position Actuator Oil Pressure Sensor Circuit High Voltage

Quick Answer

The Intake Camshaft Position Actuator Oil Pressure Sensor, located in the cylinder head, is a 3-wire sensor comprising of a signal circuit, low reference circuit and the 5-volt reference circuit. Common causes include Faulty Intake Camshaft Position Actuator Oil Pressure Sensor, Intake Camshaft Position Actuator Oil Pressure Sensor harness is open or shorted, Intake Camshaft Position Actuator Oil Pressure 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: P055D Buick indicates Intake Camshaft Position Actuator Oil Pressure Sensor Circuit High Voltage.
Common causes: Common causes include Faulty Intake Camshaft Position Actuator Oil Pressure Sensor, Intake Camshaft Position Actuator Oil Pressure Sensor harness is open or shorted, Intake Camshaft Position Actuator Oil Pressure 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.

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Code Popularity 865

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 Oct 31, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P055D Buick Description

The Intake Camshaft Position Actuator Oil Pressure Sensor, located in the cylinder head, is a 3-wire sensor comprising of a signal circuit, low reference circuit and the 5-volt reference circuit. The Engine Control Module (ECM) supplies 5 volts to the sensor via the 5-volt reference circuit and provides ground via the low reference circuit. The ECM monitors the signal circuit to determine the sensor voltage is within the normal operating range of approximately 1-4 volts. When the intake camshaft position actuator oil pressure is high, the sensor voltage is high and the ECM senses a high signal voltage. When the intake camshaft position actuator oil pressure is low, the sensor voltage is low and the ECM senses a low signal voltage. The intake camshaft position actuator oil pressure sensor is used by the ECM for variable valve lift performance diagnosis.

OBDII Code P055D Buick - Intake Camshaft Position Actuator Oil Pressure Sensor Circuit High Voltage - AutoCodes.com — P055D Buick Code - Intake Camshaft Position Actuator Oil Pressure Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P055D Buick?

Faulty Intake Camshaft Position Actuator Oil Pressure Sensor
Intake Camshaft Position Actuator Oil Pressure Sensor harness is open or shorted
Intake Camshaft Position Actuator Oil Pressure Sensor circuit poor electrical connection

How to Fix the DTC P055D Buick?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P055D Buick 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 P055D Buick Code

1. What does the OBDII code P055D mean on a Buick?

P055D indicates a high voltage issue in the Intake Camshaft Position Actuator Oil Pressure Sensor Circuit. This sensor monitors oil pressure for the intake camshaft actuator.

2. What are the common symptoms of code P055D on a Buick?

Symptoms may include rough idling, reduced engine performance, delayed acceleration, poor fuel efficiency, and the illumination of the check engine light.

3. What causes the P055D code to appear on a Buick?

Common causes include a faulty oil pressure sensor, damaged wiring or connectors, low engine oil levels, or a malfunctioning intake camshaft actuator.

4. Can low engine oil cause the P055D code on a Buick?

Yes, insufficient oil levels or dirty oil can lead to improper camshaft actuator operation and trigger the P055D code.

5. How do I diagnose the P055D code on my Buick?

Use a diagnostic scan tool to confirm the code, inspect the oil pressure sensor wiring and connectors for damage, and check the engine oil level and condition.

6. Can I drive my Buick with the P055D code?

Driving with this code is not recommended, as it can lead to poor engine performance and potentially cause further damage to the engine if left unresolved.

7. How do I fix the P055D code on a Buick?

Repairs may include replacing the oil pressure sensor, repairing damaged wiring, cleaning or replacing the camshaft actuator, or performing an oil change if the oil is dirty or low.

8. How much does it cost to fix the P055D code on a Buick?

Repair costs vary but typically range from $100 to $300, depending on whether the oil pressure sensor, wiring, or camshaft actuator needs replacement.

9. Can an electrical issue cause the P055D code?

Yes, damaged or corroded wiring, loose connectors, or a short circuit in the sensor circuit can cause the high voltage reading that triggers this code.

10. Will clearing the P055D code fix the issue permanently on my Buick?

Clearing the code without addressing the root cause will not fix the problem, and the code is likely to return. Proper diagnosis and repair are necessary.