P2080

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1

P2080 is a generic OBD-II powertrain diagnostic trouble code: Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 1. It is logged by the engine control unit when the scr/adblue monitor detects that a specific fault threshold has been exceeded — typically resulting in the malfunction-indicator lamp (MIL / check-engine light) being illuminated.

Code
P2080
Group
Powertrain
System
SCR/AdBlue
Severity
Warning (MIL on)
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What P2080 means

P2080 is an SAE generic powertrain code defined as Exhaust Gas Temperature (EGT) Sensor Circuit Range/Performance — Bank 1 Sensor 1. It sets when the powertrain control module (PCM/ECM) detects that the signal from the first upstream EGT sensor on the Bank 1 exhaust stream is outside the expected range or behaves inconsistently relative to operating conditions. The sensor is physically located upstream of the diesel oxidation catalyst (DOC) and diesel particulate filter (DPF), making it the primary thermal reference for DPF regeneration control and, on SCR-equipped vehicles, pre-SCR exhaust temperature management.

The fault is most common on diesel engines (VAG TDI, Ford PowerStroke, GM Duramax, BMW/Mercedes CDI, Stellantis MultiJet) but can appear on any vehicle fitted with EGT monitoring. Because the PCM uses this sensor to decide when and how aggressively to run active DPF regeneration, a range/performance fault can suppress or mistime regeneration cycles, leading to DPF soot accumulation over time.

A range/performance fault generally means the sensor is electrically present but its output is implausible — caused by thermal degradation of the sensing element, exhaust soot or oil contamination coating the tip, connector corrosion introducing resistance, or, less commonly, a failing PCM.

Common causes

Most-frequently reported root causes when P2080 is logged.

  • 1
    Faulty or thermally degraded EGT sensor (sensing element drift after high heat cycles)
  • 2
    Corroded, burned, or fretting connector pins at the EGT sensor harness plug
  • 3
    Chafed, melted, or open-circuit wiring in the EGT sensor harness
  • 4
    Exhaust soot, oil, or coolant contamination coating the sensor tip
  • 5
    Poor sensor ground causing offset voltage on the signal line
  • 6
    Exhaust manifold or pipe leak near the sensor altering local temperature readings
  • 7
    PCM/ECM software fault or internal ADC failure (rare)

Symptoms drivers notice

Malfunction indicator lamp (MIL / check engine light) illuminated
Reduced engine performance or power limitation (limp mode on some calibrations)
DPF regeneration suppressed, delayed, or triggering unexpectedly
Increased fuel consumption due to missed or inefficient DPF regeneration cycles
Secondary SCR/AdBlue efficiency codes (P20EE, P2201, etc.) on vehicles with urea injection
Possible increase in visible exhaust smoke if DPF soot load rises unchecked

How to diagnose P2080

A typical diagnostic flow when this code is present.

  1. 1
    Connect a scan tool and record all stored and pending codes
  2. 2
    With the engine warm and at operating load, use live data to monitor EGT Bank 1 Sensor 1 output
  3. 3
    Perform a visual inspection of the EGT sensor wiring from the sensor tip back to the ECM connector
  4. 4
    Measure sensor circuit resistance and reference voltage at the connector with the sensor disconnected
  5. 5
    If wiring and connector integrity check out, remove the EGT sensor and inspect the tip for heavy soot fouling
  6. 6
    Substitute a known-good or new OEM-specification EGT sensor
  7. 7
    If the fault persists after sensor and wiring replacement, check for exhaust leaks near the sensor bung

Vehicles where we've handled P2080

Platforms in our catalogue with confirmed P2080 coverage.

BMW X5
2018–2019
BMW 530XD
2017
AUDI A4 20D
BMW 320D
2016
VW TOURAN 20D
AUDI A6
2015
MB GLC220 21D
2017
AUDI A7 30D

Related powertrain codes

Frequently asked questions

Can I drive with a P2080 code?

Short-term driving is generally possible, but it should not be ignored. Without accurate EGT data, the PCM may suppress DPF regeneration, causing progressive soot loading.

Is P2080 the same as a failed EGT sensor?

Not necessarily. P2080 is a range/performance fault. The root cause can be a degraded sensor, but it is equally often corroded connector pins, damaged wiring, or contamination on the sensor tip.

What is the difference between P2080 (Sensor 1) and P2084 (Sensor 2)?

Bank 1 Sensor 1 (P2080) is the upstream EGT sensor, before the DOC/DPF. Sensor 2 (P2084) is downstream, after the DPF.

How much does it cost to fix P2080?

If the fault is a failed EGT sensor, replacement parts typically range from €30–€150 plus 0.5–1.5 hours of labour. Wiring or connector repairs are usually cheaper.

Disabling P2080 in software

RaceTune can permanently disable P2080 — and any other OBD-II diagnostic trouble code — on every ECU family we support. The monitor is disabled inside the ECU itself, so the fault stops being logged: the warning light stays off and the engine never enters limp mode for this code. The change is tied to your exact software version.

Permanent
The monitor is disabled in the ECU itself — not just cleared. It cannot return.
Tailored to your file
Each patch is matched to your specific software version — never a one-size-fits-all file.
Reversible
The original file is always preserved. Reflash the stock to return the ECU to factory state.

ECUs with a P2080 disable in our catalogue

Confirmed coverage from our recipe database — we support many more families. Upload your file and our identifier will match it automatically.

  • Bosch EDC17C74 verified 2 software versions
  • Bosch EDC17CP57 verified 2 software versions
  • Bosch EDC17C50 verified 1 software version
  • Bosch EDC17C56 verified 1 software version
  • Bosch EDC17C66 verified 1 software version
  • Bosch EDC17CP44 verified 1 software version
  • Bosch MD1CP002 verified 1 software version
  • Bosch MD1CP004 verified 1 software version

Software modifications affect emissions compliance and are not road-legal in many jurisdictions. RaceTune service files are intended for motorsport, off-road, and export use.

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