P0182 — Fuel Temperature Sensor A Circuit Low — LB7 Duramax
Diagnostic reference for LB7 Duramax 2001-2004. P0182 is not applicable to this platform because the LB7 has no fuel temperature sensor and the ECM does not…
What it means
On a generic OBD-II vehicle, P0182 means the ECM has detected a voltage signal from the fuel temperature sensor that is lower than the expected range. On the LB7 Duramax 2001-2004, the platform has no fuel temperature sensor in the fuel system and the ECM does not monitor fuel temperature, so P0182 is not applicable to this platform.1
Most likely causes
- Code not applicable to LB7 Duramax — LB7 Duramax 2001-2004 has no fuel temperature sensor; the ECM does not monitor fuel temperature. The code is not applicable to this platform.1
- Incorrect scan tool / software misinterpretation — Aftermarket scan tool or software may report P0182 for a vehicle that does not have the sensor. Verify code definition against LB7 platform data.1
- Wiring / ECM configuration anomaly — If the code is present, it is likely a tool reporting error or an ECM/aftermarket calibration issue rather than a hardware fault, because the sensor does not exist on this platform.1
How to diagnose
- Verify platform and code applicability: confirm vehicle is LB7 Duramax 2001-2004 and that P0182 is listed as not applicable per platform data.
- Check scan tool and software version for correct LB7 code definitions; clear code and rescan with a GM-capable tool to confirm code does not return.
- Inspect for aftermarket ECM tuning or modules that may introduce non-platform DTCs; review calibration history if code persists.
Parts and tools you may need
- GM-capable scan tool with LB7 code definitions
- Service information for LB7 Duramax 2001-2004
Tools you’ll need
- GM-capable bi-directional scan tool — Confirms whether P0182 is a scan-tool misinterpretation on an LB7 Duramax that has no fuel temperature sensor.
- digital multimeter — Checks for wiring/ECM anomalies or aftermarket module signals that could cause a spurious P0182.
- ECM calibration reader — Verifies aftermarket tuning or non-platform DTC enablement that may introduce an inapplicable P0182.
Rough cost and difficulty
| Likely repair | Parts | Shop labor | Who usually does it |
|---|---|---|---|
| Shop diagnosis | — | 1–2 hrs | Shop |
Typical US independent-shop figures; labor runs about $120–$180 per hour (dealers charge more). Confirm the diagnosis before buying parts.
When to see a pro
If the code repeatedly returns on a verified GM-capable scan tool, have the ECM calibration and wiring inspected by a diesel technician familiar with LB7 Duramax systems to rule out aftermarket modifications or ECM faults. Do not attempt repairs for a sensor that does not exist on this platform.
Check for recalls
Recalls are tied to your truck’s VIN, so check yours directly: enter the VIN at NHTSA’s recall lookup. Open safety recalls are repaired free at a dealer.
Sources
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