P0133 on 2000-2004 Nissan Frontier — O2 Sensor Circuit Slow Response (Bank 1, Sensor 1)
1 vehicles · 1 makes · $400-$1,400 repair
Most Reported On
P0133 is an OBD-II diagnostic trouble code meaning “O2 Sensor Circuit Slow Response (Bank 1, Sensor 1).” This code indicates the upstream oxygen sensor on bank 1 is responding too slowly when switching between rich and lean readings. The computer relies on this sensor to react quickly so it can fine-tune the air-fuel mixture in real time. When the sensor's response time falls below specification, this code sets. It typically causes reduced fuel economy, higher emissions, and a failed emissions test, though drivability may be only mildly affected. This code is most commonly reported on 2000-2004 Nissan Frontier, with repair costs ranging from $400 to $1,400.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0133, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
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FAQ
What does P0133 mean?
P0133 stands for "O2 Sensor Circuit Slow Response (Bank 1, Sensor 1)." This code indicates the upstream oxygen sensor on bank 1 is responding too slowly when switching between rich and lean readings. The computer relies on this sensor to react quickly so it can fine-tune the air-fuel mixture in real time. When the sensor's response time falls below specification, this code sets. It typically causes reduced fuel economy, higher emissions, and a failed emissions test, though drivability may be only mildly affected.
What are the most common causes of P0133?
The most common causes of P0133 are: Aged or contaminated upstream O2 sensor (bank 1), Exhaust leak near the sensor, Vacuum leak affecting air-fuel ratio, Wiring or connector corrosion at the sensor, Contaminated sensor (oil, coolant, or silicone), Low fuel pressure or fuel delivery issues, Faulty sensor heater circuit slowing warm-up. The specific cause varies by vehicle.
How much does it cost to fix P0133?
Repair costs for P0133 range from $400 to $1,400, depending on the vehicle and root cause.
Which vehicles are affected by P0133?
Au7o has documented P0133 across 1 vehicle models from 1 manufacturers: Nissan.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.