Code
P2084
Generic
P — Powertrain
Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2
Views:
UK: 17
EN: 36
RU: 53
AI status
Completed
Completed
100%
Causes
- Failed or degraded EGT sensor (Bank 1 Sensor 2)
- Open, shorted or damaged wiring between the sensor and PCM
- Corroded, loose or water-intruded connector
- Exhaust leak near sensor causing abnormal readings
- Sensor contaminated by oil, soot or coolant
- Faulty sensor heater circuit (if equipped)
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
- Failed or incomplete aftertreatment (DPF) regeneration events
- Reduced engine performance or limp mode on some vehicles
- Poor fuel economy or increased emissions
- Stored freeze frame and related aftertreatment fault messages
What to check
- Retrieve freeze frame data and read live EGT sensor values with a scan tool
- Perform a visual inspection of sensor, wiring harness and connector for damage, corrosion or contamination
- Wiggle-test wiring and connector while monitoring live data for intermittent changes
- Back-probe the connector to monitor sensor signal and heater circuits (if applicable)
- Check continuity and resistance of sensor leads to the PCM; check for shorts to ground or battery
- Verify related fuses/relays for sensor heater power and ground circuits
Signal parameters
- Signal type: thermocouple (mV) or temperature-dependent resistance/voltage depending on vehicle design
- Typical PCM-range: sensor signal commonly mapped to an EGT value; expected post-catalyst temperatures lower than pre-catalyst
- Heater circuit (if present): supplied by vehicle 12 V feed and switched/grounded by driver — expect ~12 V supply and low resistance across heater when cold
- Fault indications: open circuit (very high resistance/no signal), short to ground/battery (signal stuck at 0 V or supply voltage), implausible rapid jumps or flat-lined values
Diagnostic algorithm
- Use a scan tool to confirm P2084 and check freeze frame/live data. Note conditions when code set (load, RPM, temperature).
- Perform a visual inspection of the Bank 1 Sensor 2 harness, connector and sensor for heat damage, soot, oil or corrosion.
- With ignition OFF, disconnect the sensor and inspect connector pins. Repair or replace damaged connector/pins.
- Back-probe sensor signal and heater pins with ignition ON (engine off if checking heater supply). Verify reference voltages and ground presence per vehicle service info.
- Measure sensor element resistance (or thermocouple output if applicable) and compare to manufacturer's specification. Check heater resistance if present.
- Check continuity from the sensor connector to the PCM connector. Look for opens, high resistance or shorts to ground/battery.
- Wiggle the harness and monitor live data to reproduce intermittent behavior. Inspect exhaust for leaks near the sensor location.
- If wiring and connectors are good but sensor readings remain implausible, replace the EGT sensor and clear codes. Road test to confirm proper operation and that code does not return.
- If code returns after a known-good sensor, perform PCM wiring harness diagnostics for intermittent faults or consider PCM/ECM testing per manufacturer procedures.
Likely causes
- Broken or chafed harness leading to intermittent or no signal
- Connector pins corroded or pushed out
- Sensor element degraded from age/contamination or thermal shock
- Short to battery or ground in the sensor signal or heater circuit
- Exhaust system modification or leak between sensors altering temperature profile
Fault status
Status
EGT sensor Bank 1 Sensor 2 output is outside expected range or performance thresholds. PCM flagged circuit performance fault; may inhibit aftertreatment control/regeneration and illuminate MIL.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
Workshop Manuals
Available brands with manuals
2
AUDI 11
6-speed manual gearbox 0B1, front-wheel drive — Workshop Manual (Edition 05.2014)
Workshop Manual199,00 UAH
Audi A3 (1997) – 1.6L 4-cylinder (2‑valve) Engine Mechanical Components Service Manual (AEH, AKL, APF) – Edition 07.2002
Workshop Manual199,00 UAH
AUDI A3 (2004) Workshop Manual — 2.0L FSI Turbo (4‑cyl, 4‑valve) Engine, Mechanics — Edition 03.2017
Workshop Manual199,00 UAH
Audi A3 2004 — Electrical System (Workshop Manual, Edition 02.2018)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet – 4.2 l V8 (5‑valve, timing chains) – Workshop Manual (Mechanics) – Edition 04.2007
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet — Auxiliary Heater Workshop Manual (Edition 08.2004)
Workshop Manual199,00 UAH
Audi A4 / A4 Cabriolet (1.8T 4‑cyl turbo) — Motronic Injection & Ignition System Service Manual (Edition 01.2015)
Workshop Manual199,00 UAH
Audi A8 (2003) — Electrical System Workshop Manual (Edition 08.2014)
Workshop Manual199,00 UAH
Audi Q4 e-tron (Type F4) - Self-study Programme SSP 685
Workshop Manual199,00 UAH
Audi Q8 (2018) — Electrical System Workshop Manual (Edition 05.2019)
Workshop Manual199,00 UAH
Audi Servicing Manual — 7‑Speed Dual Clutch Transmission 0CJ / 0CL / 0CK / 0DN / 0DP / 0HL (Edition 05.2018)
Workshop Manual199,00 UAH
LAND ROVER 3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
Code
P2084
LAND ROVER
P — Powertrain
Gamma / performance of the gas temperature sensor circuit escape - bank 1, sensor 2
Views:
UK: 9
EN: 23
RU: 40
AI status
Completed
Completed
100%
Causes
- Failed or degraded EGT sensor (Bank 1 Sensor 2)
- Open, shorted or damaged wiring between the sensor and PCM
- Corroded, loose or water-intruded connector
- Exhaust leak near sensor causing abnormal readings
- Sensor contaminated by oil, soot or coolant
- Faulty sensor heater circuit (if equipped)
Symptoms
- Malfunction Indicator Lamp (MIL) / Check Engine Light illuminated
- Failed or incomplete aftertreatment (DPF) regeneration events
- Reduced engine performance or limp mode on some vehicles
- Poor fuel economy or increased emissions
- Stored freeze frame and related aftertreatment fault messages
What to check
- Retrieve freeze frame data and read live EGT sensor values with a scan tool
- Perform a visual inspection of sensor, wiring harness and connector for damage, corrosion or contamination
- Wiggle-test wiring and connector while monitoring live data for intermittent changes
- Back-probe the connector to monitor sensor signal and heater circuits (if applicable)
- Check continuity and resistance of sensor leads to the PCM; check for shorts to ground or battery
- Verify related fuses/relays for sensor heater power and ground circuits
Signal parameters
- Signal type: thermocouple (mV) or temperature-dependent resistance/voltage depending on vehicle design
- Typical PCM-range: sensor signal commonly mapped to an EGT value; expected post-catalyst temperatures lower than pre-catalyst
- Heater circuit (if present): supplied by vehicle 12 V feed and switched/grounded by driver — expect ~12 V supply and low resistance across heater when cold
- Fault indications: open circuit (very high resistance/no signal), short to ground/battery (signal stuck at 0 V or supply voltage), implausible rapid jumps or flat-lined values
Diagnostic algorithm
- Use a scan tool to confirm P2084 and check freeze frame/live data. Note conditions when code set (load, RPM, temperature).
- Perform a visual inspection of the Bank 1 Sensor 2 harness, connector and sensor for heat damage, soot, oil or corrosion.
- With ignition OFF, disconnect the sensor and inspect connector pins. Repair or replace damaged connector/pins.
- Back-probe sensor signal and heater pins with ignition ON (engine off if checking heater supply). Verify reference voltages and ground presence per vehicle service info.
- Measure sensor element resistance (or thermocouple output if applicable) and compare to manufacturer's specification. Check heater resistance if present.
- Check continuity from the sensor connector to the PCM connector. Look for opens, high resistance or shorts to ground/battery.
- Wiggle the harness and monitor live data to reproduce intermittent behavior. Inspect exhaust for leaks near the sensor location.
- If wiring and connectors are good but sensor readings remain implausible, replace the EGT sensor and clear codes. Road test to confirm proper operation and that code does not return.
- If code returns after a known-good sensor, perform PCM wiring harness diagnostics for intermittent faults or consider PCM/ECM testing per manufacturer procedures.
Likely causes
- Broken or chafed harness leading to intermittent or no signal
- Connector pins corroded or pushed out
- Sensor element degraded from age/contamination or thermal shock
- Short to battery or ground in the sensor signal or heater circuit
- Exhaust system modification or leak between sensors altering temperature profile
Fault status
Status
EGT sensor Bank 1 Sensor 2 output is outside expected range or performance thresholds. PCM flagged circuit performance fault; may inhibit aftertreatment control/regeneration and illuminate MIL.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
Similar codes
HTML Workshop Manuals AI manual library for LAND ROVER Click to show available manuals 39
LAND ROVER 2018 Discovery HSE Luxury, 3.0L Eng VIN K
HTML ManualLAND ROVER 2018 Discovery HSE Luxury, 3.0L Eng VIN V
HTML ManualLAND ROVER 2018 Discovery HSE, 3.0L Eng VIN K
HTML ManualLAND ROVER 2018 Discovery HSE, 3.0L Eng VIN V
HTML ManualLAND ROVER 2018 Discovery Sport HSE
HTML ManualLAND ROVER 2018 Discovery Sport HSE Luxury
HTML ManualLAND ROVER 2018 Discovery Sport SE
HTML ManualLAND ROVER 2018 Range Rover Autobiography
HTML ManualWorkshop Manuals
Repair manuals for LAND ROVER
3
Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email
