P0323 - Ignition/Distributor Engine Speed Input Circuit Intermittent
The P0323 code indicates that the Powertrain Control Module (PCM) has detected an intermittent or erratic signal from the ignition/distributor engine speed input circuit. This circuit typically uses a crankshaft position sensor or distributor pickup to provide engine RPM data. An intermittent signal can cause misfires, stalling, or no-start conditions. Common causes include a faulty crankshaft position sensor, damaged wiring or connectors, a failing ignition control module, or a defective distributor pickup coil.
01. Most Common Causes
- Faulty crankshaft position sensor
- Damaged or corroded wiring/connectors in the sensor circuit
- Failing ignition control module
- Defective distributor pickup coil (if applicable)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Intermittent stalling or no-start condition
- Poor acceleration or hesitation
03. Step-by-Step Diagnosis
Step 1: Scan for additional codes and record freeze frame data.
Step 2: Visually inspect the crankshaft position sensor and wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's resistance and AC voltage output while cranking the engine (specs vary by vehicle).
Step 4: Check for proper sensor gap and mounting; replace if out of spec.
Step 5: If sensor tests OK, inspect the ignition control module and distributor pickup coil (if equipped).
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with P0323 as it can cause stalling or no-start conditions, leading to a safety hazard. Have the vehicle diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for parts and labor, depending on the root cause and vehicle make/model.