P0150
Fix within 1-2 weeksThe engine computer is not receiving the correct signal from the upstream oxygen sensor on Bank 2. This sensor measures oxygen levels in the exhaust before the catalytic converter on the side of the engine that does not contain cylinder #1.
Code P0150 means your Bank 2 Sensor 1 O2 sensor circuit has a problem. Common causes: Faulty O2 sensor (75%), wiring issues (15%). Drivability: Yes, safe to drive. Repair cost: $50-$150 DIY, $150-$450 professional.
Can I Drive With P0150?
Yes, safe to drive
No restrictions, but fix within 1-2 weeks to avoid further issues.
Stop driving immediately if: Flashing Check Engine Light, significant power loss, or a strong rotten egg smell from the exhaust.
Symptoms of P0150
- 1Check Engine Light is on
- 2Reduced fuel economy
- 3Engine hesitation or rough idle
- 4Engine may run rich or lean
Common Causes of P0150
Parts most likely causing this code, ranked by probability
The oxygen sensor itself has failed and is sending incorrect or no voltage signals to the engine computer.
75% of P0150 cases are fixed by replacing this part
Damaged, corroded, or loose wiring or a faulty connector prevents the sensor's signal from reaching the engine computer correctly.
15% of P0150 cases are fixed by repairing wiring or connectors
An exhaust leak near the Bank 2 Sensor 1 allows outside air to enter the exhaust stream, causing the sensor to read incorrectly.
5% of P0150 cases are fixed by repairing an exhaust leak
A rare internal fault within the engine computer can prevent it from correctly processing the oxygen sensor's signal.
5% of P0150 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Visually inspect the Bank 2 Sensor 1 wiring harness and connector for any signs of damage, fraying, or corrosion.
- Listen for any hissing or puffing sounds from the exhaust system, especially near the sensor, which could indicate an exhaust leak.
How to Diagnose P0150
- 1Inspect the Bank 2 Sensor 1 wiring and connector for damage, corrosion, or loose connections.
- 2Check for exhaust leaks near the Bank 2 Sensor 1 and upstream of it.
- 3Use a scan tool to monitor the live data for Bank 2 Sensor 1 voltage. Look for a fluctuating signal between 0.1V and 0.9V.
- 4If the signal is flat or erratic, test the sensor's heater circuit and signal circuit with a multimeter.
- 5If wiring and exhaust are good and the sensor signal is incorrect, replace the Bank 2 Sensor 1.
P0150 on Popular Vehicles
Ford F-150
2004-2024On V8 F-150s, Bank 2 is the driver's side. The sensor can be difficult to access due to tight engine bay space. Ensure you're replacing the correct sensor (upstream, driver's side).
70% fixed by replacing the O2 sensor
Chevrolet Silverado
2007-2024For V8 Silverado models, Bank 2 is the driver's side. The Bank 2 Sensor 1 is located in the exhaust manifold or just after it. Check for exhaust manifold leaks, which are common on these trucks, before replacing the sensor.
65% fixed by replacing the O2 sensor, 10% by fixing exhaust leak
Toyota Camry
2007-2024For V6 Camry models, Bank 2 is typically the rear bank (firewall side). Access to this sensor can be challenging due to its location. Ensure proper heat shielding is reinstalled after replacement.
75% fixed by replacing the O2 sensor
Frequently Asked Questions
What does P0150 mean?
P0150 indicates that the engine computer has detected an issue with the electrical circuit of the upstream oxygen sensor on Bank 2. This sensor is critical for monitoring exhaust gases and adjusting fuel delivery.
Can I drive with P0150?
Yes, you can drive safely with a P0150 code. However, you should fix it within 1-2 weeks. Ignoring it will lead to reduced fuel economy and can cause long-term damage to your catalytic converter.
Will P0150 clear itself?
No, P0150 will not clear itself. The engine computer will continue to detect the circuit malfunction until the underlying problem is resolved. You will need to fix the issue and then clear the code with a scan tool.
How do I fix P0150 myself?
Start by inspecting the wiring and connector for the Bank 2 Sensor 1. Check for exhaust leaks near the sensor. If those are good, replacing the Bank 2 Sensor 1 oxygen sensor is the most common fix. You'll need an O2 sensor socket.
How much does it cost to fix P0150?
DIY repair costs for P0150 are typically $50-$150 for the oxygen sensor part. Professional repair at a shop will cost $150-$450, including parts and labor.
P0150 keeps coming back - why?
If P0150 keeps returning, you likely have an intermittent wiring issue, a persistent exhaust leak that was missed, or the replacement sensor itself is faulty. In rare cases, the engine computer could be the problem.
Will P0150 fail emissions/smog test?
Yes, a P0150 code will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on is an automatic failure, and the faulty O2 sensor prevents the emissions system from operating correctly.
What's the difference between P0150 and P0130?
P0150 refers to a circuit malfunction in the upstream oxygen sensor on Bank 2 (the side of the engine without cylinder #1). P0130 refers to the same type of circuit malfunction but for the upstream oxygen sensor on Bank 1 (the side of the engine with cylinder #1).
P0150 on Ford F-150?
On a Ford F-150 with a V8 engine, Bank 2 is typically the driver's side of the engine. The Bank 2 Sensor 1 is located in the exhaust manifold or exhaust pipe before the catalytic converter on that side. The most common fix is replacing this specific oxygen sensor.
Questions to Ask Your Mechanic
Did you check for exhaust leaks near the Bank 2 Sensor 1?
Good answer: Yes, I performed a visual inspection and listened for leaks. I also checked the exhaust manifold bolts for tightness.
What were the live data readings for Bank 2 Sensor 1?
Good answer: The sensor voltage was flat at 0.45V, or it was stuck high/low, indicating a circuit malfunction. It was not switching as expected.
Repair Cost Estimate
DIY Repair
Parts only
$50-$150
Shop Repair
Parts + labor
$150-$450
Save $100-$300 by doing it yourself
Difficulty
intermediate
Time
1-2 hours
Intermediate - requires specific tools like an O2 sensor socket and potentially a scan tool for proper diagnosis, but the physical replacement is manageable for most DIYers.
Cost of Waiting
Ignoring P0150 will cause your engine to run inefficiently, leading to significantly worse fuel economy. More critically, the incorrect fuel mixture can damage your catalytic converter over time. A $50-$150 oxygen sensor replacement now prevents a $800-$2,500 catalytic converter replacement later.
While You're In There...
If you find an exhaust leak or need to remove exhaust components for sensor access, replacing old gaskets prevents future leaks and ensures a proper seal.
Applying anti-seize to the new O2 sensor threads prevents it from seizing in the exhaust pipe, making future removal much easier.
Tools You'll Need
- OBD-II Scan Tool
- Oxygen Sensor Socket (7/8 inch or 22mm)
- Ratchet and extensions
- Wire brush
- Multimeter (optional, for advanced diagnostics)
- Anti-seize compound
P0150 is a common code related to a critical but replaceable sensor. Most repairs are straightforward and will restore your vehicle's fuel efficiency and emissions performance.
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Your Next Steps
Step 1: Inspect the wiring and connector for Bank 2 Sensor 1. Look for any visible damage, corrosion, or loose connections. Also, check for any exhaust leaks near the sensor.
Step 2: If the wiring and exhaust are good, use an OBD-II scan tool to monitor the live data for Bank 2 Sensor 1. If the voltage signal is flat or erratic, the sensor is likely faulty.
Step 3: Parts you'll likely need: One Bank 2 Sensor 1 oxygen sensor. Consider an O2 sensor socket for easier removal and installation.