O2 Sensor Positive Current Control Circuit High Bank 2 Sensor 1
The P2242 code indicates that the powertrain control module (PCM) has detected a high voltage or current in the positive current control circuit for the oxygen sensor located on Bank 2, Sensor 1 (upstream of the catalytic converter). This circuit is responsible for regulating the sensor's heater and pump current. A high condition suggests a short to voltage, a faulty sensor, or a wiring issue, which can affect air-fuel ratio readings and emissions.
01. Most Common Causes
- Short to voltage in the O2 sensor positive current control circuit
- Faulty oxygen sensor (Bank 2 Sensor 1)
- Damaged wiring or connector at the sensor
- Corroded or loose electrical connections
- Failed PCM (rare)
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor fuel economy
- Rough idle or hesitation
- Failed emissions test
03. Step-by-Step Diagnosis
Step 1: Use an OBD2 scanner to confirm the code and check for other related codes.
Step 2: Visually inspect the wiring and connector for Bank 2 Sensor 1 for damage, corrosion, or loose connections.
Step 3: Test the sensor's heater circuit and signal voltage with a multimeter; compare to manufacturer specs.
Step 4: If wiring is intact, replace the oxygen sensor (Bank 2 Sensor 1).
Step 5: Clear the code and test drive to see if it returns; if it does, check the PCM.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is generally safe to drive short distances, but prolonged driving may cause poor fuel economy and potential damage to the catalytic converter. It's best to diagnose and repair promptly.
How much does it cost to fix?▼
The cost typically ranges from $50 to $150 for a DIY replacement of the oxygen sensor, including the part. Professional labor may add $50-$100.