P2618 — Crankshaft Position Signal Output Circuit Low

powertrain (engine/transmission)

Is it safe to drive?

Do not drive Do not rely on the car. A failing crank sensor causes sudden stalling with no warning — potentially dangerous in traffic. Fix it before driving further.

How to diagnose with an OBD scanner

  1. Read the code and freeze frame Connect an OBD2 scanner, confirm P2618 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Check for companion codes and TSBs Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Inspect wiring and connectors Visually inspect the wiring harness and connectors related to the crankshaft position sensing for damage, corrosion, chafing or poor contact.
  4. Subsystem check Check for supply voltage at the crankshaft position signal output connector first; then measure resistance from the signal wire to ground — near-zero ohms confirms a short to ground in the harness.
  5. Subsystem check Watch the rpm PID while cranking — no reading points to the crank sensor circuit.
  6. Subsystem check Inspect the sensor, its connector and the reluctor wheel for damage and metal debris.
  7. Verify the repair Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2618 does not return.

Approximate repair cost

Repair cost depends on which component actually failed. Typical scenarios for P2618 (parts and labor, USD, independent shop rates): Repair sensor wiring: $80–$250; Replace the crankshaft position sensor: $150–$400; Replace the reluctor wheel: $400–$900. Overall, fixing P2618 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Common questions

What does OBD2 code P2618 mean?

Crankshaft Position Signal Output Circuit Low (P2618): a powertrain (engine/transmission) fault affecting the crankshaft position sensing. Driving is not recommended until fixed. Most often caused by failed crankshaft position sensor, damaged reluctor wheel on the crankshaft, damaged sensor wiring or connector.

What are the symptoms of P2618?

Drivers most often notice: Check Engine Light on, intermittent no-start when hot, sudden stalling while driving, tachometer not working while cranking.

Will P2618 clear itself?

Sometimes P2618 clears after a few drive cycles if the fault was intermittent — for example a loose connector or a tank of bad fuel. The underlying cause usually remains, so the code tends to return. Clear it once; if it comes back, diagnose rather than erase it repeatedly.

What is the most common cause of P2618?

The most common causes are: failed crankshaft position sensor, damaged reluctor wheel on the crankshaft, damaged sensor wiring or connector.

Is it safe to drive with P2618?

Do not rely on the car. A failing crank sensor causes sudden stalling with no warning — potentially dangerous in traffic. Fix it before driving further.

What does P2618 mean?

Seeing P2618 on your scanner? The control unit has caught the crankshaft position sensing operating outside its calibrated window. The formal description is “Crankshaft Position Signal Output Circuit Low”, and the code is grouped under powertrain (engine/transmission) faults.

“Circuit low” means the voltage on the crankshaft position signal output circuit stays below the expected minimum — close to ground. The usual physical reasons are a short to ground, a chafed wire touching metal, a missing supply voltage, or a failed component dragging the signal down.

The module monitors this system continuously while driving. When readings fall outside the expected range for a defined number of drive cycles, it stores P2618 and switches on the warning light. Freeze frame data saved with the code shows the exact conditions — rpm, load, temperature, speed — at the moment the fault was detected, which is the best starting point for diagnosis.

What causes P2618?

  • failed crankshaft position signal output pulling the signal low
  • missing supply voltage to the crankshaft position signal output
  • signal wire shorted to ground (chafed insulation)
  • damaged sensor wiring or connector
  • damaged reluctor wheel on the crankshaft
  • incorrect sensor air gap
  • failed crankshaft position sensor

Common symptoms of P2618

  • Check Engine Light on
  • intermittent no-start when hot
  • sudden stalling while driving
  • tachometer not working while cranking
  • engine cranks but does not start

How to diagnose P2618

  1. Connect an OBD2 scanner, confirm P2618 is stored, and save the freeze frame data — it shows engine conditions when the fault was detected.
  2. Related codes often reveal the real root cause. Also check manufacturer technical service bulletins (TSB) for your make and model — many P0xxx issues have factory fixes or software updates. Search by VIN on the manufacturer site or nhtsa.gov.
  3. Visually inspect the wiring harness and connectors related to the crankshaft position sensing for damage, corrosion, chafing or poor contact.
  4. Check for supply voltage at the crankshaft position signal output connector first; then measure resistance from the signal wire to ground — near-zero ohms confirms a short to ground in the harness.
  5. Watch the rpm PID while cranking — no reading points to the crank sensor circuit.
  6. Inspect the sensor, its connector and the reluctor wheel for damage and metal debris.
  7. Clear the code, complete a full drive cycle including the conditions from the freeze frame, and confirm P2618 does not return.

How to fix P2618

Start with the cheapest and most common causes before replacing expensive parts:

  • Repair sensor wiring — $80–$250
  • Replace the crankshaft position sensor — $150–$400
  • Replace the reluctor wheel — $400–$900

How much does it cost to fix P2618?

Repair cost depends on which component actually failed. Typical scenarios for P2618 (parts and labor, USD, independent shop rates):

  • Repair sensor wiring: $80–$250
  • Replace the crankshaft position sensor: $150–$400
  • Replace the reluctor wheel: $400–$900

Overall, fixing P2618 usually costs between $80 and $900. An accurate diagnosis before buying parts saves money — the most expensive scenario is rarely the first one to check.

Can you drive with P2618?

Do not rely on the car. A failing crank sensor causes sudden stalling with no warning — potentially dangerous in traffic. Fix it before driving further.

Related OBD2 codes