Diesel Trouble Codes

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…

Updated September 2, 2026

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

  1. 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
  2. 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
  3. 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

  1. Verify platform and code applicability: confirm vehicle is LB7 Duramax 2001-2004 and that P0182 is listed as not applicable per platform data.
  2. 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.
  3. 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

Rough cost and difficulty

No repair is required for a non-applicable code. Cost is limited to diagnostic verification time. If the code is a tool reporting error, correcting scan tool/software eliminates the concern.

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.

Sources

  1. Curated DTC seed — LB7 Duramax (curated) ↩︎ ↩︎ ↩︎ ↩︎