Barometric Pressure Sensor Circuit High
The P2229 code indicates that the Engine Control Module (ECM) has detected a voltage signal from the barometric pressure sensor that is higher than the expected range. This sensor measures atmospheric pressure to help the ECM adjust fuel delivery and ignition timing. A high circuit condition typically means the signal voltage is above the normal operating range, often due to a short to voltage, a faulty sensor, or wiring issues.
01. Most Common Causes
- Faulty barometric pressure sensor
- Short to voltage in the sensor circuit
- Damaged wiring or connector
- ECM internal failure (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor engine performance or hesitation
- Reduced fuel economy
- Rough idle or stalling
03. Step-by-Step Diagnosis
Step 1: Use a scan tool to verify the code and check for additional codes.
Step 2: Inspect the barometric pressure sensor and its wiring for damage, corrosion, or loose connections.
Step 3: Test the sensor's voltage reference and signal output with a multimeter; compare to manufacturer specifications.
Step 4: If sensor and wiring are okay, replace the barometric pressure sensor and clear the code.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe for short trips, but the vehicle may experience reduced performance and fuel economy. It's best to diagnose and repair promptly to avoid potential drivability issues.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150, including parts and labor. The sensor itself is often inexpensive, and labor is minimal if the sensor is easily accessible.