Crankshaft Position Sensor A Circuit Range/Performance
The P0336 code indicates that the Engine Control Module (ECM) has detected a signal from the crankshaft position sensor that is out of the expected range or performance parameters. This sensor monitors the rotational speed and position of the crankshaft, which is critical for engine timing, fuel injection, and ignition. A faulty signal can cause the ECM to miscalculate timing, leading to drivability issues.
1. Most Common Causes
- Faulty crankshaft position sensor
- Damaged or loose wiring/connectors to the sensor
- Excessive crankshaft endplay or damaged reluctor ring
- ECM software or hardware issues
2. Symptoms You Will Notice
- Engine misfire or rough running
- Check Engine Light illuminated
- Engine stalling or difficulty starting
- Reduced fuel economy and performance
3. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the crankshaft position sensor and wiring for damage or corrosion.
Step 3: Test sensor resistance and AC voltage output with a multimeter while cranking the engine.
Step 4: Check for proper sensor gap and reluctor ring condition.
Step 5: If sensor and wiring are okay, test ECM signal processing with a scope or replace the sensor.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with P0336 as it can cause stalling, poor performance, and potential engine damage. Have it diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a sensor replacement, plus diagnostic fees. Labor may add $50-$100 depending on vehicle accessibility.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.