P0150: O2 Sensor Circuit Malfunction (Bank 2 Sensor 1)
Can you still drive? Yes, but fuel economy will be reduced and emissions increased. Bank 2 cylinders will not have optimized fuel control. Repair within a few weeks.
What Does P0150 Mean?
Code P0150 indicates a malfunction in the upstream oxygen sensor on Bank 2. This sensor monitors exhaust gases on the opposite side of the engine from Bank 1 and is essential for fuel trim control on that bank. Without a functioning sensor, the ECU cannot optimize the air-fuel mixture for Bank 2 cylinders.
Need to read your codes?
An OBD-II scanner lets you read and clear diagnostic trouble codes from your vehicle's computer. Most scanners work with any car made after 1996.
Browse OBD-II Scanners on AmazonCommon Causes
- Faulty O2 sensor
- Damaged wiring or connector
- Exhaust manifold leak on Bank 2
- Sensor contamination from oil or coolant consumption
Symptoms
- Check engine light on
- Poor fuel economy
- Rough idle
- Failed emissions test
- Possible exhaust smell
Diagnostic Steps
- 1Read and document freeze frame data
- 2Monitor Bank 2 Sensor 1 voltage with a scan tool
- 3Inspect O2 sensor wiring and connector for damage
- 4Check for exhaust leaks on the Bank 2 exhaust manifold
- 5Test O2 sensor heater circuit
- 6Replace O2 sensor if it fails to switch properly
Recommended Parts & Tools
oxygen sensor
O2 sensor socket
penetrating oil
Estimated Repair Cost
| Type | Estimated Cost |
|---|---|
| Total Repair Cost Range | $60 - $400 |
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Chat with AI About P0150Commonly Affected Vehicles
Related Recalls
1 Active Recall — 2026 Ford F-150
The following NHTSA safety recalls have been issued for this vehicle. Contact your dealer to check if your vehicle is affected.
ELECTRICAL SYSTEM: INTEGRATED TRAILER BRAKE CONTROL
Ford Motor Company (Ford) is recalling certain 2021-2026 F-150, 2022-2026 F-250 SD, F-350 SD, F-450 SD, F-550 SD, Maverick, 2024-2026 Ranger, 2023-2026 F-600 SD, 2022-2027 Lincoln Navigator, Expedition, and 2026 E-Transit vehicles. When towing a trailer, the integrated trailer module (ITRM) may lose communication with the vehicle, possibly causing a loss of brake and turn signal lights, or a loss of brake function. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 108, " Lamps, Reflective Devices, and Associated Equipment."
Remedy: The integrated trailer module software will be updated by a dealer, or through an over-the-air (OTA) update, free of charge. Owner notification letters are expected to be mailed March 17, 2026. Owners may contact Ford customer service at 1-866-436-7332. Ford's number for this recall is 26C10. Vehicle Identification Numbers (VINs) involved in this recall will be searchable on NHTSA.gov beginning March 17, 2026.
Data provided by the National Highway Traffic Safety Administration (NHTSA).
Frequently Asked Questions
What is Bank 2?
Bank 2 is the side of the engine that does not contain cylinder 1. On V6 and V8 engines, the cylinders are split into two banks. Bank 2 is the opposite side from cylinder 1.
Is the Bank 2 Sensor 1 harder to reach?
On many vehicles, the Bank 2 upstream sensor can be more difficult to access depending on the engine layout. Some may require removing components for access, which is why this is rated as advanced difficulty.
Community Fix Reports
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