P0018 Code - Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor 'A'
Quick Answer
The Crankshaft Position (CKP) sensor is a permanent magnet generator, known as a variable reluctance sensor. Common causes include Mechanical timing fault, Blocked oil passage, Low oil level. 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
- P0018 indicates Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor 'A'.
- Common causes
- Common causes include Mechanical timing fault, Blocked oil passage, Low oil level.
- 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 P0018 Description
The Camshaft Position (CMP) sensor is triggered by a notched reluctor wheel built into the exhaust camshaft sprocket. The CMP sensor provides 6 signal pulses every camshaft revolution. Each notch, or feature of the reluctor wheel is of a different size for individual cylinder identification. This means the CMP and crankshaft position (CKP) signals are pulse width encoded to enable the PCM to constantly monitor their relationship. This relationship is used to determine camshaft actuator position and control its phasing at the correct value. The PCM also uses this signal to identify the compression stroke of each cylinder, and for sequential fuel injection. The CMP sensor is connected to the PCM by a 12-volt, low reference, and signal circuit.
What are the Possible Causes of the DTC P0018?
- Mechanical timing fault
- Blocked oil passage
- Low oil level
- Faulty Intake ('A') Camshaft Position (CMP) Sensor
- Faulty Crankshaft Position (CKP) Sensor
How to Fix the DTC P0018?
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 P0018 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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Information for Specific Makes
- P0018 Audi — Crankshaft Position Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Buick — Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Cadillac — Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Chevrolet — Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Ford — Crankshaft Position Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 GMC — Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Hummer — Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Hyundai — Crankshaft Position-Camshaft Position Correction- Bank 2 Sensor 'A'
- P0018 KIA — Crankshaft Position-Camshaft Position Correction- Bank 2 Sensor 'A'
- P0018 Lexus — Crankshaft Position Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Lincoln — Crankshaft Position Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Mazda — Crankshaft Position Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Mercury — Crankshaft Position Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Pontiac — Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Saturn — Crankshaft Position - Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Scion — Crankshaft Position Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Subaru — Crankshaft Position - Camshaft Position Correlation Bank 2
- P0018 Suzuki — Crankshaft Position - Intake Camshaft Position Correlation Bank 2
- P0018 Toyota — Crankshaft Position Camshaft Position Correlation Bank 2 Sensor 'A'
- P0018 Volkswagen — Crankshaft Position Camshaft Position Correlation Bank 2 Sensor 'A'
Frequently Asked Questions about P0018 Code
What are common symptoms of OBDII code P0018?
- Common symptoms of code P0018 include rough idling, engine misfiring, reduced fuel efficiency, and stalling.
What are possible causes of OBDII code P0018?
- Possible causes of code P0018 include a faulty camshaft or crankshaft position sensor, timing chain or belt issues, engine oil problems, or a malfunctioning VVT (Variable Valve Timing) actuator.
How can I diagnose OBDII code P0018?
- Diagnosing code P0018 typically involves using an OBDII scanner to retrieve the code, inspecting the camshaft and crankshaft position sensors, checking the timing components, and verifying oil levels and quality.
What should I check first when troubleshooting code P0018?
- When troubleshooting code P0018, start by checking the engine oil level and condition, as low or dirty oil can affect the proper functioning of the camshaft and crankshaft sensors.
Can I continue driving with OBDII code P0018?
- It is not recommended to continue driving with code P0018 active, as it can lead to further engine damage and potential safety hazards. It is best to address the issue promptly.
How can I repair OBDII code P0018?
- Repairing code P0018 may involve replacing faulty sensors, addressing timing chain or belt issues, ensuring proper engine oil levels and quality, and fixing any VVT actuator problems.
Is it possible to clear OBDII code P0018 without fixing the underlying issue?
- Clearing code P0018 without fixing the underlying issue is not advised, as the problem will likely reoccur. It is important to address the root cause of the code to prevent future issues.
What are the long-term consequences of ignoring OBDII code P0018?
- Ignoring code P0018 can lead to engine damage, reduced performance, increased fuel consumption, and potential breakdowns. It is crucial to address the issue promptly to prevent further complications.
Can a DIY enthusiast fix OBDII code P0018 at home?
- While some aspects of fixing code P0018 can be done at home by a DIY enthusiast, diagnosing and repairing more complex issues such as timing component problems may require professional help.
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