P1219 - CID Stuck Low
The P1219 code indicates that the Cylinder Identification (CID) sensor or circuit is reporting a low voltage condition, typically below the expected threshold. This sensor is used by the engine control module (ECM) to determine which cylinder is firing for precise ignition timing and fuel delivery. A stuck low signal can result from a faulty sensor, wiring issues (short to ground), or a problem with the ECM itself. This condition can cause misfires, rough running, and reduced engine performance.
1. Symptoms You Will Notice
- Check Engine Light on
- Engine misfire or rough idle
- Poor acceleration or hesitation
- Decreased fuel economy
2. Most Common Causes
- Faulty CID sensor
- Short to ground in CID sensor circuit
- Damaged wiring or connector
- ECM failure (rare)
3. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for additional codes.
Step 2: Visually inspect the CID sensor and wiring for damage, corrosion, or loose connections.
Step 3: Test the CID sensor voltage with a multimeter; compare to manufacturer specifications.
Step 4: Check for shorts to ground in the sensor circuit using a multimeter.
Step 5: If sensor and wiring are okay, test the ECM output or consult a professional for further diagnosis.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the engine may misfire, leading to potential catalytic converter damage or stalling. Short trips to a repair shop are acceptable.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for diagnosis and sensor replacement, but can be higher if ECM replacement is needed.
5. Commonly Affected Makes
This is a manufacturer-specific code. The exact manufacturer is not confirmed in our current database.