P2EA5

Code

Generic P — Powertrain

Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 6

Brand: Generic

Type: P — Powertrain

Views: UK: 11 EN: 23 RU: 15

AI status

Completed

ready

Completed 100%

Page language: EN

Causes

Faulty EGT sensor (thermocouple/thermistor) for Bank 1 Sensor 6
Open, shorted or corroded wiring or connector between the sensor and PCM
Failed sensor heater or heater circuit fault (if equipped)
Excessive soot/ash, contamination or sensor damage from exhaust conditions
Exhaust leak or physical damage near the sensor altering readings
PCM or control module fault (less common)

Symptoms

Malfunction Indicator Lamp (MIL) illuminated
Reduced ability to initiate or complete diesel particulate filter (DPF) regen (diesel applications)
Degraded engine or aftertreatment performance, possible limp mode depending on vehicle
Increased exhaust temps warnings or protective derate
Stored freeze frame / live data showing abnormal or erratic EGT values

What to check

Retrieve freeze frame and live data for EGT sensor 6 and related sensors; record values and conditions when code set
Visually inspect sensor, connector and wiring for heat damage, soot, corrosion, or physical damage
Check connector for proper seating and bent/pushed pins; clean and reseat
Measure heater supply voltage and ground at the connector with key on (expect battery voltage ~10–14 V if heater present)
Measure sensor output signal (voltage or millivolt) while cold and warmed or during a controlled heat application
Check continuity and resistance of signal and heater circuits back to the PCM; look for shorts to ground or power

Signal parameters

EGT sensor output should change smoothly with temperature; erratic or flat-lined readings indicate a problem
Typical EGT ranges (vehicle and application dependent): idle/normal operation ~100–600 °C, regeneration/events up to 800–1,000 °C
Sensor electrical signal types vary by design: thermocouples provide millivolt output proportional to temp; some sensors use 0–5 V signals or thermistors—compare to OEM spec
Heater circuit (if equipped) normally draws current and should show ~12 V supply at connector with appropriate resistance (refer to OEM specs for exact values)
Any sudden jumps, stuck high/low, or no-change readings are out of expected behavior

Diagnostic algorithm

Read and record codes, freeze frame and live data for Bank 1 Sensor 6 and neighboring sensors.
Clear codes and attempt to reproduce; note when and under what conditions the code returns.
Perform a visual inspection of the sensor, mounting area and harness for damage, soot accumulation, or exhaust leaks.
With key on (engine off), check for heater power/ground at the sensor connector (if equipped). Verify fuse/relay for heater circuit.
Back-probe the sensor signal and measure voltage/millivolt while warming the exhaust (idle/run or controlled heat source where safe). Confirm signal changes with temperature.
Check continuity/resistance of signal and heater wires from sensor connector to PCM; repair any opens/shorts or corroded terminals.
Wiggle test wiring and connectors while monitoring live data to find intermittent faults.
If wiring and power/ground are good but signal is out of range, replace the EGT sensor and retest.
If fault persists after sensor replacement, inspect PCM connectors and consider module diagnostics or replacement as a last resort.

Likely causes

Damaged harness insulation or pin corrosion at sensor connector
Sensor element degraded by high temps or contamination (soot/ash/metallic debris)
Blown fuse or poor power/ground to heater circuit
Connector not fully seated or pins pushed back
Intermittent open/short caused by vibration or heat cycling

Fault status

⚠️ Status

Exhaust Gas Temperature Sensor Circuit Range/Performance — Bank 1 Sensor 6. PCM detected sensor signal outside the expected range or inconsistent performance.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-3.0 hours