P2618 Fault Code

Crankshaft Position Signal Output Circuit Low

• What does that mean?
• Symptoms
• Causes
• Solutions

The P2618 fault code indicates an issue with the crankshaft position signal output circuit, suggesting that the signal from the crankshaft position sensor is lower than expected. This can affect the engine's ability to time ignition and fuel injection correctly, potentially leading to misfires or stalling.

• This code is primarily found in vehicles equipped with an electronic control unit (ECU) that relies on accurate crankshaft positioning for optimal engine performance.
• It is essential to diagnose the underlying issue to prevent severe engine damage or drivability problems.

What are the symptoms of the P2618 code?

When the P2618 code is present, drivers may experience symptoms such as:

• Engine misfires or stalling during operation, particularly at low RPMs.
• Difficulty starting the engine, with potential rough idling.
• Illumination of the check engine light, indicating a fault in engine performance.
• In some cases, the vehicle may enter a limp mode, restricting power to protect the engine.

What causes the P2618 code?

Several factors can lead to the P2618 fault code, including:

• A faulty crankshaft position sensor that is unable to provide a proper signal.
• Damaged wiring or poor connections in the crankshaft position sensor circuit, causing signal loss.
• Issues with the engine control unit (ECU) itself, which may not properly interpret the signals it receives.
• Mechanical problems such as timing belt or chain wear that affect crankshaft positioning.

How to fix P2618?

To resolve the P2618 fault code, technicians typically follow these steps:

• Begin by visually inspecting the crankshaft position sensor and its wiring for any signs of damage or corrosion.
• Check the sensor's resistance and output voltage to ensure it is functioning within specifications.
• Repair or replace any faulty wiring or connectors in the crankshaft position sensor circuit.
• If the sensor is confirmed to be faulty, replace it with a new unit.
• Lastly, clear the code from the ECU and conduct a test drive to confirm that the issue has been resolved.