P0162
Fix within 1-2 weeksYour engine's computer detects a consistently low voltage signal from the oxygen sensor located after the catalytic converter on Bank 2. This sensor monitors the exhaust gases after they've passed through the catalyst.
Code P0162 means your Bank 2 Sensor 3 O2 sensor reports low voltage. Common causes: Bad O2 sensor (70%), exhaust leak (15%), wiring issues (10%). Drivability: Yes, safe to drive. Repair cost: $50-$200 DIY, $150-$500 professional.
Can I Drive With P0162?
Yes, safe to drive
No restrictions
Stop driving immediately if: Flashing Check Engine Light (indicates a misfire), loud exhaust noises, burning smell, significant power loss.
Symptoms of P0162
- 1Check Engine Light is on
- 2Reduced fuel economy
- 3Vehicle fails emissions test
Common Causes of P0162
Parts most likely causing this code, ranked by probability
The oxygen sensor itself is faulty and consistently reports a low voltage, indicating a lean condition or a sensor failure.
70% of P0162 cases are fixed by replacing this part
An exhaust leak near the sensor can draw in outside air, causing the sensor to incorrectly read a lean condition (low voltage).
15% of P0162 cases are fixed by repairing an exhaust leak
Damaged wiring or a corroded connector to the oxygen sensor can prevent the correct voltage signal from reaching the engine computer.
10% of P0162 cases are fixed by repairing wiring or connectors
A rare internal fault within the engine's computer can cause it to misinterpret the O2 sensor signal or fail to process it correctly.
5% of P0162 cases are fixed by replacing the ECM/PCM
Check These First (Before Buying Parts)
- Visually inspect the Bank 2 Sensor 3 oxygen sensor and its wiring for any obvious damage, fraying, or corrosion.
- Listen for any exhaust leaks near the sensor. You can also feel for exhaust gases with your hand (carefully, when cold) or use soapy water to look for bubbles.
How to Diagnose P0162
- 1Visually inspect the Bank 2 Sensor 3 oxygen sensor and its wiring for any damage, corrosion, or loose connections.
- 2Check for any exhaust leaks near the oxygen sensor, especially at flanges or welds.
- 3Use a scan tool to monitor the live data for Bank 2 Sensor 3. Look for a consistently low voltage reading (close to 0V) that does not fluctuate.
- 4Test the O2 sensor's heater circuit and signal circuit using a multimeter to confirm proper operation and resistance.
- 5If all other components check out, consider testing the PCM for proper O2 sensor input processing.
P0162 on Popular Vehicles
Ford F-150
2004-2024P0162 on F-150s is frequently a straightforward O2 sensor replacement. Access to Bank 2 Sensor 3 (passenger side, post-catalyst) can be tight, especially on 4WD models. Always check for exhaust manifold or pipe leaks first.
75% fixed by replacing the O2 sensor
Chevrolet Silverado
2007-2024Silverados commonly experience O2 sensor failures, and P0162 is no exception. Corrosion on the sensor connector or wiring due to road salt and debris is a known issue. Inspect wiring thoroughly before replacing the sensor.
70% fixed by replacing the O2 sensor
Honda Accord
2003-2024On Honda Accords, P0162 can sometimes be linked to exhaust system age and minor leaks developing around the catalytic converter or exhaust pipe. Always check for exhaust leaks before condemning the O2 sensor itself.
65% fixed by replacing the O2 sensor
Frequently Asked Questions
What does P0162 mean?
P0162 indicates that the oxygen sensor located after the catalytic converter on Bank 2 (the side of the engine without cylinder #1) is sending a consistently low voltage signal to the engine's computer. This suggests a lean condition or a fault with the sensor or its circuit.
Can I drive with P0162?
Yes, you can drive safely with P0162. This code does not typically cause immediate engine damage or drivability issues. However, you will experience reduced fuel economy and your vehicle will fail an emissions test. Fix this within 1-2 weeks.
Will P0162 clear itself?
No, P0162 will not clear itself. The engine computer will continue to detect the low voltage signal from the O2 sensor. You need to diagnose and fix the underlying problem, then clear the code with a scan tool.
How do I fix P0162 myself?
Start by visually inspecting the O2 sensor and its wiring for damage or loose connections. Check for exhaust leaks near the sensor. If those are fine, replacing the Bank 2 Sensor 3 oxygen sensor is the most common fix. You'll need an O2 sensor socket and a ratchet.
How much does it cost to fix P0162?
The cost to fix P0162 ranges from $50-$200 if you do it yourself, primarily for the O2 sensor part. If you take it to a professional shop, expect to pay $150-$500, which includes parts and labor.
P0162 keeps coming back - why?
If P0162 keeps returning, it means the root cause was not fully addressed. This often happens if you only replaced the O2 sensor but had an underlying exhaust leak, a wiring issue, or a problem with the catalytic converter that the sensor is monitoring. A thorough diagnosis is necessary.
Will P0162 fail emissions/smog test?
Yes, P0162 will cause your vehicle to fail an emissions or smog test. The Check Engine Light being on, regardless of the code, is an automatic failure in most jurisdictions. Additionally, the code indicates an issue with your emissions monitoring system.
What's the difference between P0162 and P0161?
P0162 indicates a low voltage signal from the Bank 2 Sensor 3 oxygen sensor, meaning the sensor itself is reporting a lean condition or is faulty. P0161, on the other hand, indicates a malfunction in the heater circuit for the Bank 2 Sensor 3 oxygen sensor, meaning the sensor isn't heating up properly to provide accurate readings.
P0162 on Ford F-150?
On a Ford F-150, P0162 often points directly to a failing Bank 2 Sensor 3 oxygen sensor. These sensors can wear out over time, especially on trucks with higher mileage or those exposed to harsh conditions. Always check for exhaust leaks first, as F-150 exhaust systems can develop leaks.
Questions to Ask Your Mechanic
Did you check the live data for Bank 2 Sensor 3 to confirm the low voltage reading and its lack of fluctuation?
Good answer: Yes, I monitored the sensor's voltage with the engine running at operating temperature. It was consistently below 0.1V and showed no activity, confirming the sensor is either faulty or seeing a constant lean condition.
What did you find when you inspected the exhaust system for leaks near the sensor?
Good answer: I performed a visual inspection and a smoke test on the exhaust system. There were no detectable leaks near the Bank 2 Sensor 3 location, ruling out outside air intrusion.
Repair Cost Estimate
DIY Repair
Parts only
$50-$200
Shop Repair
Parts + labor
$150-$500
Save $100-$300 by doing it yourself
Difficulty
intermediate
Time
1-2 hours
Intermediate - requires specific tools like an O2 sensor socket and the ability to get under the vehicle safely. Basic diagnostic skills with a scan tool are also helpful.
Cost of Waiting
Ignoring P0162 means your vehicle is running inefficiently and polluting more. You will fail emissions testing. While not immediately damaging to the engine, prolonged incorrect readings can lead to reduced fuel economy and potentially mask other issues that could damage your catalytic converter over time. A $50-$150 O2 sensor replacement now prevents a failed emissions test and ensures proper engine monitoring.
While You're In There...
If you find an exhaust leak or need to remove exhaust components to access the sensor, replacing old, brittle gaskets prevents future leaks and ensures a proper seal.
Applying anti-seize to the threads of the new O2 sensor prevents it from seizing in the exhaust pipe, making future removal much easier.
Tools You'll Need
- OBD-II Scan Tool
- O2 Sensor Socket
- Ratchet
- Jack and Jack Stands
- Safety Glasses
- Wire Brush
- Anti-seize Compound
- Multimeter (for advanced diagnostics)
P0162 is a common emissions code. Most repairs involve replacing the oxygen sensor, which is a straightforward job for an intermediate DIYer. Your vehicle will pass emissions and run more efficiently afterward.
- Family-owned since 1957
- 990,000+ happy customers
- Fast nationwide shipping
- Easy returns
Your Next Steps
Step 1: Visually inspect the Bank 2 Sensor 3 O2 sensor and its wiring for any damage or loose connections. Check for exhaust leaks near the sensor.
Step 2: If no obvious issues are found, use an OBD-II scan tool to monitor the live data for Bank 2 Sensor 3. If the voltage is consistently low and doesn't fluctuate, the sensor is likely faulty.
Step 3: Parts you'll likely need: A new Bank 2 Sensor 3 oxygen sensor and possibly an O2 sensor socket for removal and installation.