TR
EN
P2087 Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2
P2087 Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2 is a generic OBD-II diagnostic trouble code indicating that the Engine Control Module (ECM/PCM) has detected an intermittent electrical signal from the Exhaust Gas Temperature (EGT) sensor circuit on Bank 2 Sensor 2.
In simple terms, the computer is receiving an unstable, inconsistent, or intermittently interrupted signal from an exhaust temperature sensor.
The EGT sensor monitors exhaust temperature and provides information that helps the ECM protect the engine and emissions-control components from excessive heat.
Depending on the vehicle, EGT information may be used to monitor or protect:
-
Turbochargers
-
Catalytic converters
-
Diesel particulate filters (DPF)
-
Gasoline particulate filters (GPF)
-
Exhaust aftertreatment systems
-
Exhaust gas recirculation (EGR) systems
-
Engine components
When the EGT sensor signal intermittently falls outside the expected electrical behavior, the ECM may store P2087 and illuminate the Check Engine Light.
The exact location and function of Bank 2 Sensor 2 vary by vehicle. Therefore, the vehicle manufacturer's wiring diagram and component-location information should be used to identify the correct sensor.
What Does P2087 Mean?
The code description can be divided into four parts.
Exhaust Gas Temperature Sensor
An EGT sensor measures the temperature of exhaust gases.
The sensor typically changes its electrical resistance according to exhaust temperature. The ECM converts this electrical signal into a temperature value.
The ECM can then determine whether exhaust temperature is within the expected operating range.
Circuit Intermittent
"Intermittent" means the ECM is detecting a problem that comes and goes.
This is different from a constant circuit-high or circuit-low fault.
The signal may appear normal for several seconds or minutes and then suddenly:
-
Drop out
-
Become unstable
-
Change unexpectedly
-
Show an implausible temperature
-
Lose continuity
-
Return to normal
Intermittent faults are often associated with wiring, connectors, sensor terminals, vibration, or heat-related damage.
Bank 2
Bank 2 refers to the engine bank that does not contain cylinder number one.
On a V-type engine:
-
Bank 1 = side containing cylinder #1
-
Bank 2 = opposite side
Inline engines normally have only one bank, so Bank 2 generally does not apply.
Sensor 2
Sensor 2 identifies the sensor's position within the exhaust system according to the manufacturer's configuration.
On many vehicles, Sensor 2 is located downstream of the catalytic converter or another major exhaust component, but this is not universal.
The exact location should be confirmed with vehicle-specific service information.
How Does an EGT Sensor Work?
A typical EGT system works as follows:
-
Exhaust gases heat the EGT sensor.
-
The sensor's electrical characteristics change with temperature.
-
The ECM supplies or monitors the sensor circuit.
-
The resulting signal changes according to exhaust temperature.
-
The ECM calculates the approximate exhaust temperature.
-
The ECM compares the temperature with expected values.
-
The information is used for engine and emissions control.
-
If the signal becomes intermittent or implausible, the ECM may store P2087.
The sensor is exposed to extremely high temperatures, vibration, exhaust pressure, moisture, and thermal cycling. These conditions can eventually damage the sensor or its wiring.
Symptoms of P2087
Symptoms can vary considerably depending on the vehicle and how the EGT sensor is used.
Check Engine Light
The Check Engine Light is the most common symptom.
Reduced Engine Performance
Some vehicles may enter a protective operating strategy when an EGT signal becomes unreliable.
Possible effects include:
-
Reduced engine power
-
Limited boost
-
Reduced throttle response
-
Restricted engine speed
-
Reduced acceleration
Not every vehicle will experience reduced performance.
Poor Fuel Economy
An incorrect exhaust temperature signal can affect engine or emissions-control strategies and may increase fuel consumption.
DPF or Aftertreatment Problems
On diesel vehicles, an EGT sensor may be important for DPF regeneration and exhaust aftertreatment temperature management.
An intermittent sensor signal can potentially interfere with:
-
DPF regeneration
-
Exhaust temperature control
-
Aftertreatment monitoring
Turbocharger Performance Problems
On turbocharged engines, exhaust temperature information may be used as part of turbocharger protection strategies.
A faulty signal may contribute to:
-
Reduced boost
-
Limp mode
-
Reduced acceleration
Increased Emissions
Incorrect exhaust temperature information can interfere with emissions-control strategies.
The vehicle may fail emissions testing if the fault remains active.
Difficult DPF Regeneration
If the vehicle uses the EGT sensor for DPF regeneration, an unreliable temperature signal may prevent the ECM from completing a regeneration cycle correctly.
Abnormal Exhaust Temperature Readings
A scan tool may show:
-
Sudden temperature jumps
-
Implausibly low temperatures
-
Implausibly high temperatures
-
Temperature values that suddenly disappear
-
Temperature readings that fluctuate without corresponding engine-load changes
No Noticeable Symptoms
An intermittent P2087 fault may initially cause only the Check Engine Light.
The vehicle can sometimes drive normally until the fault becomes more frequent.
Common Causes of P2087
Damaged EGT Sensor Wiring
This is one of the most important possibilities with an intermittent EGT code.
The wiring is exposed to intense exhaust heat and vibration.
Possible problems include:
-
Melted insulation
-
Brittle wires
-
Cracked insulation
-
Broken conductors
-
Chafing
-
Heat damage
-
Wiring pulled tight
-
Intermittent internal wire breaks
Loose Electrical Connector
A connector that is not fully seated can intermittently interrupt the sensor signal.
Possible causes include:
-
Loose connector
-
Damaged locking tab
-
Poor terminal tension
-
Corrosion
-
Water intrusion
-
Oil contamination
-
Dirt or debris
Corroded Sensor Terminals
Corrosion increases electrical resistance and can cause an intermittent signal.
This is particularly common when the connector is exposed to:
-
Moisture
-
Road salt
-
Water
-
Exhaust condensation
Faulty EGT Sensor
The EGT sensor itself may be failing.
An aging sensor may produce:
-
Intermittent readings
-
Incorrect resistance
-
Temperature jumps
-
Signal dropouts
-
Slow or abnormal response
Repeated thermal cycling can eventually damage the sensing element.
Heat Damage
The sensor and wiring may be exposed to extremely high temperatures.
Excessive heat can damage:
-
Sensor body
-
Sensor wiring
-
Connector
-
Wiring insulation
-
Nearby harness components
A harness routed too close to the exhaust can develop intermittent faults as the engine reaches operating temperature.
Vibration-Related Wiring Fault
Engine vibration can cause a partially broken wire or loose connector to make and lose contact repeatedly.
The fault may therefore appear only:
-
At certain RPM
-
Under acceleration
-
Over rough roads
-
When the engine moves on its mounts
-
When the exhaust system vibrates
Exhaust System Damage
A damaged exhaust component may expose the sensor or wiring to abnormal heat or physical stress.
Possible locations include:
-
Exhaust pipe
-
Catalytic converter
-
DPF
-
Turbocharger outlet
-
Exhaust manifold
-
Exhaust flex pipe
Incorrect Previous Repair
Poorly repaired wiring can produce intermittent problems.
Examples include:
-
Incorrect wire splice
-
Poor crimp
-
Loose terminal
-
Incorrect connector
-
Wires routed too close to hot exhaust components
Water or Moisture Intrusion
Moisture entering the connector can create intermittent electrical resistance or signal interruptions.
Sensor Contamination
In some applications, contamination or physical damage can affect sensor behavior.
Possible contaminants include:
-
Soot
-
Oil
-
Coolant
-
Fuel
-
Exhaust deposits
Exhaust Temperature Actually Too High
P2087 specifically concerns an intermittent circuit, so a genuinely high exhaust temperature does not automatically explain the code.
However, abnormal exhaust temperatures can contribute to sensor or wiring damage.
Possible causes of unusually high exhaust temperature include:
-
Rich air-fuel mixture
-
Lean operation
-
Ignition timing problems
-
Misfire
-
Restricted exhaust
-
Turbocharger problems
-
DPF regeneration problems
These conditions should be considered if scan-tool data shows genuinely abnormal exhaust temperatures.
Engine or Fuel System Problems
Problems affecting combustion can produce unusual exhaust temperatures and potentially stress the EGT sensor.
Possible causes include:
-
Misfires
-
Faulty injectors
-
Incorrect fuel pressure
-
Air-fuel mixture problems
-
Ignition problems
-
Incorrect injection timing
ECM/PCM Problem
A problem with the ECM sensor-input circuit is possible but generally less common than a sensor, connector, or wiring fault.
The ECM should not be blamed until the external circuit has been properly tested.
Software or Calibration Problem
Some vehicles may have manufacturer-specific software issues that affect EGT sensor monitoring.
An ECM software update may be required if the manufacturer has issued a relevant calibration update.
Vehicles Commonly Affected by P2087
P2087 can occur on many vehicles equipped with multiple EGT sensors and multi-bank exhaust systems.
Examples include:
-
Ford F-150
-
Ford Super Duty
-
Ford Explorer
-
Ford Expedition
-
Chevrolet Silverado
-
Chevrolet Tahoe
-
Chevrolet Suburban
-
GMC Sierra
-
GMC Yukon
-
Ram 1500
-
Ram 2500
-
Ram 3500
-
Jeep Grand Cherokee
-
Jeep Wrangler
-
BMW X5
-
BMW X6
-
Mercedes-Benz GLE
-
Mercedes-Benz G-Class
-
Audi Q7
-
Volkswagen Touareg
-
Porsche Cayenne
-
Land Rover Discovery
-
Range Rover
This list is not exhaustive.
P2087 is a generic OBD-II code, and the exact sensor location, sensor technology, and control strategy vary by manufacturer and engine.
How Is P2087 Diagnosed?
Because P2087 is an intermittent circuit fault, diagnosis should focus heavily on reproducing the electrical interruption.
Replacing the EGT sensor immediately without checking the wiring can result in an unnecessary repair.
Step 1: Scan for All Trouble Codes
Use a suitable diagnostic scan tool to retrieve:
-
Stored codes
-
Pending codes
-
History codes
-
Manufacturer-specific codes
-
Freeze-frame data
Look for related codes involving:
-
EGT sensors
-
Exhaust temperature
-
DPF
-
Catalytic converter
-
Turbocharger
-
Fuel mixture
-
Misfire
-
Exhaust pressure
Step 2: Check Freeze-Frame Data
Record:
-
Engine RPM
-
Engine load
-
Vehicle speed
-
Coolant temperature
-
Intake temperature
-
Exhaust temperature
-
Battery voltage
-
DPF status, if applicable
Determine under what conditions the intermittent fault occurred.
Step 3: Monitor Live EGT Data
Use a scan tool to monitor the Bank 2 Sensor 2 EGT temperature.
Look for:
-
Sudden temperature jumps
-
Abrupt drops
-
Signal loss
-
Implausible temperatures
-
Unstable readings
Compare the reading with other EGT sensors where appropriate.
Step 4: Identify Bank 2 Sensor 2
Do not assume that Sensor 2 is always located immediately after the catalytic converter.
Use the manufacturer's service information to identify:
-
Bank 2
-
Sensor 2
-
Sensor location
-
Connector
-
Wiring
-
Expected resistance or voltage
This is especially important on vehicles with multiple exhaust temperature sensors.
Step 5: Inspect the Sensor
Check for:
-
Physical damage
-
Cracks
-
Corrosion
-
Burn marks
-
Contamination
-
Loose mounting
-
Damaged sensor wiring
Step 6: Inspect the Connector
Check for:
-
Loose connection
-
Corrosion
-
Bent pins
-
Spread terminals
-
Backed-out terminals
-
Broken locking mechanism
-
Water intrusion
-
Melted plastic
Step 7: Inspect the Wiring Harness
Trace the EGT sensor wiring toward the ECM.
Look for:
-
Melted insulation
-
Heat damage
-
Chafing
-
Broken wires
-
Pinched wires
-
Loose harness clips
-
Contact with exhaust components
-
Previous repairs
The wiring close to the exhaust deserves particular attention.
Step 8: Perform a Wiggle Test
Because the fault is intermittent, a wiggle test can be especially useful.
With the scan tool monitoring the EGT signal, carefully move the sensor wiring and connector.
If the temperature signal suddenly changes or disappears, investigate the corresponding section of the harness.
Step 9: Check Sensor Resistance
Depending on sensor type and manufacturer procedure, measure sensor resistance.
Compare the result with the manufacturer's specification at the applicable temperature.
Do not use a universal resistance value because EGT sensor characteristics vary.
Step 10: Check Circuit Continuity
Test the wiring between the EGT sensor and ECM.
Check for:
-
Open circuits
-
High resistance
-
Short circuits
-
Intermittent continuity
Step 11: Check Reference or Supply Voltage
Some EGT sensors use a reference voltage circuit, while others use different electrical configurations.
Verify the expected supply/reference voltage using the vehicle-specific wiring diagram.
Step 12: Check Ground or Return Circuit
Where applicable, verify:
-
Ground integrity
-
Return-circuit continuity
-
Voltage drop
-
Connector condition
Step 13: Check the Signal Circuit
Monitor the sensor signal while:
-
Starting the engine
-
Warming the engine
-
Raising engine speed
-
Driving under load, where safe
-
Allowing the exhaust temperature to change
The signal should change smoothly and consistently according to the sensor's design.
Step 14: Check for Heat-Related Failure
An intermittent fault may appear only when the exhaust system becomes hot.
Inspect the sensor and harness when:
-
Cold
-
Warm
-
Fully heat-soaked
A wire that works when cold but opens when hot is a common type of intermittent fault.
Step 15: Compare EGT Sensors
Where multiple EGT sensors are available, compare their readings.
A sudden, implausible difference between sensors can help identify the faulty circuit.
However, different sensor locations naturally operate at different temperatures, so readings should only be compared when the operating conditions and sensor locations make the comparison meaningful.
Step 16: Check Exhaust System Condition
Inspect for:
-
Exhaust leaks
-
Damaged pipes
-
Restricted exhaust
-
Damaged DPF
-
Catalytic converter problems
-
Turbocharger-related problems
Step 17: Check Engine Operation
If EGT readings indicate genuinely excessive exhaust temperatures, investigate:
-
Misfires
-
Fuel mixture
-
Fuel injectors
-
Ignition timing
-
Injection timing
-
Boost pressure
-
Exhaust restriction
Step 18: Check DPF/Aftertreatment Operation
On diesel vehicles, check:
-
DPF loading
-
Regeneration status
-
Regeneration history
-
Differential pressure
-
Exhaust temperature behavior
-
Related aftertreatment codes
Step 19: Check Manufacturer Service Information
Look for:
-
Technical Service Bulletins
-
Known EGT sensor failures
-
Wiring harness problems
-
Connector issues
-
Heat-damage problems
-
ECM software updates
-
Sensor replacement procedures
Step 20: Perform Required Relearn or Reset Procedures
Some vehicles may require an adaptation reset or relearn after replacing an EGT sensor.
Follow the manufacturer's procedure.
How to Fix P2087
The correct repair depends on what the diagnostic tests reveal.
Repair Damaged EGT Wiring
Repair or replace wiring affected by:
-
Heat
-
Chafing
-
Vibration
-
Corrosion
-
Broken conductors
-
Incorrect previous repairs
Wiring should be routed away from excessive exhaust heat and secured according to manufacturer specifications.
Repair or Replace the Connector
If the connector has:
-
Corroded terminals
-
Loose terminals
-
Damaged locking tabs
-
Melted housing
-
Water damage
the connector or terminals may need to be repaired or replaced.
Replace the Faulty EGT Sensor
If testing confirms that Bank 2 Sensor 2 is defective, replace the sensor with the correct component for the vehicle.
Do not select an EGT sensor based only on physical appearance. Sensor resistance and signal characteristics can differ between applications.
Repair Exhaust Problems
Repair:
-
Exhaust leaks
-
Damaged pipes
-
Exhaust restrictions
-
DPF problems
-
Catalytic converter problems
if they are contributing to the fault.
Correct Engine Problems
If genuinely excessive exhaust temperature is found, repair the underlying engine problem.
Possible repairs may involve:
-
Fuel injectors
-
Ignition components
-
Fuel-pressure problems
-
Air-fuel mixture problems
-
Boost-control problems
-
Injection timing
-
Misfire-related problems
Repair DPF or Aftertreatment Problems
On applicable diesel vehicles, correct problems involving:
-
DPF regeneration
-
DPF loading
-
Exhaust temperature control
-
Differential-pressure issues
-
Aftertreatment components
Update or Reprogram the ECM
If manufacturer service information identifies a software or calibration problem, perform the applicable update.
Replace the ECM/PCM
ECM replacement should generally be the last step.
Before replacing it, verify:
-
EGT sensor
-
Sensor connector
-
Wiring
-
Supply/reference circuit
-
Ground/return circuit
-
Signal circuit
-
Continuity
-
Resistance
-
Voltage
-
Exhaust system
-
Engine operating conditions
-
Manufacturer software updates
What Happens If P2087 Is Ignored?
Ignoring P2087 may lead to:
-
Check Engine Light remaining illuminated
-
Increased emissions
-
Poor fuel economy
-
Reduced engine performance
-
Limp mode on some vehicles
-
DPF regeneration problems
-
Aftertreatment problems
-
Incorrect exhaust-temperature monitoring
If the underlying issue is an actual excessive exhaust-temperature condition, continued driving may increase the risk of damage to:
-
Turbocharger
-
Catalytic converter
-
DPF
-
GPF
-
Other exhaust components
The risk depends heavily on the vehicle and the reason for the abnormal temperature.
Can You Drive With P2087?
Short-term driving may be possible if the vehicle runs normally and the Check Engine Light is steady, but P2087 should be diagnosed promptly.
Extra caution is required on diesel vehicles that depend on EGT sensors for DPF regeneration or exhaust aftertreatment control.
Driving should be avoided if the vehicle develops:
-
Severe power loss
-
Limp mode
-
Repeated stalling
-
Excessive smoke
-
Strong exhaust smell
-
Abnormal turbocharger noise
-
Overheating
-
Flashing Check Engine Light
-
Other serious warning lights
A flashing Check Engine Light, severe misfire, or major drivability problem should be treated as an urgent fault.
Is P2087 a Serious Code?
P2087 is generally considered a moderate-severity diagnostic trouble code, but its seriousness depends on the underlying cause and the vehicle's emissions system.
An intermittent connector or damaged wire may be relatively easy to repair.
However, an EGT sensor fault can become more important when the sensor is used to control or protect:
-
DPF regeneration
-
Catalytic converters
-
Turbochargers
-
Exhaust aftertreatment
-
Engine protection strategies
Therefore, P2087 should not simply be cleared without identifying the reason for the intermittent signal.
P2087 vs. Related Exhaust Temperature Codes
| Code | General Description |
|---|---|
| P2084 | Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2 |
| P2085 | Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2 |
| P2086 | Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2 |
| P2087 | Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2 |
| P2088 | "A" Camshaft Position Actuator Control Circuit Low Bank 1 |
| P2089 | "A" Camshaft Position Actuator Control Circuit High Bank 1 |
| P2090 | "B" Camshaft Position Actuator Control Circuit Low Bank 1 |
| P2091 | "B" Camshaft Position Actuator Control Circuit High Bank 1 |
Important: Generic OBD-II databases can contain inconsistent descriptions for some neighboring codes. The exact EGT sensor location and circuit designation should always be verified against manufacturer-specific service information.
The important distinction for P2087 is that it identifies an intermittent electrical problem involving the Bank 2 Sensor 2 exhaust gas temperature sensor circuit.
How to Prevent P2087
Regular maintenance and careful inspection of the exhaust system can help reduce the risk of EGT sensor problems.
Recommended practices include:
-
Maintain the engine according to manufacturer recommendations.
-
Use the correct engine oil and filters.
-
Keep the fuel system properly maintained.
-
Address engine misfires promptly.
-
Repair exhaust leaks quickly.
-
Keep EGT sensor wiring away from excessive heat.
-
Ensure wiring harnesses are properly secured.
-
Keep electrical connectors clean and dry.
-
Address damaged wiring before it becomes intermittent.
-
Maintain the DPF and aftertreatment system where applicable.
-
Avoid unauthorized exhaust modifications.
-
Avoid poorly installed tuning or electrical modifications.
-
Keep ECM software updated when applicable.
-
Do not ignore recurring Check Engine Light warnings.
Final Thoughts
The P2087 Exhaust Gas Temperature Sensor Circuit Intermittent Bank 2 Sensor 2 diagnostic trouble code indicates that the ECM/PCM has detected an intermittent electrical problem in the exhaust gas temperature sensor circuit associated with Bank 2 Sensor 2.
The most likely causes include:
-
Faulty EGT sensor
-
Damaged sensor wiring
-
Heat-damaged insulation
-
Loose connector
-
Corroded terminals
-
Poor terminal tension
-
Broken or partially broken wire
-
Vibration-related wiring problems
-
Water intrusion
-
Incorrect previous repairs
-
Exhaust-system damage
-
Engine conditions causing abnormal exhaust temperatures
-
ECM/software problems
Because the fault is specifically intermittent, the most effective diagnostic strategy is to monitor the EGT sensor live data while inspecting and carefully manipulating the sensor wiring and connector.
A sensor that works normally when cold but loses its signal after the exhaust becomes hot can point toward a heat-related sensor or wiring failure.
If the electrical circuit is confirmed to be healthy, diagnosis should continue into the exhaust and engine systems to determine whether genuinely abnormal exhaust temperatures are contributing to the fault.
Prompt diagnosis is especially important on vehicles where the EGT sensor is used for DPF regeneration, catalytic-converter protection, turbocharger protection, or exhaust aftertreatment control.
