P2EA3

Code

Generic P — Powertrain

Exhaust Gas Temperature Sensor Circuit Low Bank 1 Sensor 6

Brand: Generic

Type: P — Powertrain

Views: UK: 31 EN: 42 RU: 21

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Malfunction Indicator Lamp (MIL) illuminated
Reduced engine performance or turbo derate (on turbocharged engines)
Inhibited diesel particulate filter regeneration or engine derate in diesel systems
Loss of EGT-based control or incorrect EGT-based diagnostics
No obvious driveability symptoms at low load

Read freeze frame and live data for EGT Bank 1 Sensor 6 and related sensors
Verify vehicle operating conditions when DTC set (engine temp, load, exhaust temp)
Visually inspect harness and connector at Sensor 6 for damage, corrosion, soot, or heat damage
Check mating connector pins for tightness and continuity
Back-probe sensor signal and ground with engine cold and during controlled heating to observe changing signal
Measure continuity and resistance between sensor ground and vehicle chassis/engine ground

EGT sensors are typically thermocouples or RTDs; output increases with temperature—consult OEM spec
Typical cold/ambient output near 0–10 mV (thermocouple) or low resistance for RTD
Normal operating EGT signals vary widely; many systems see tens of millivolts at high temp
Signal considered low if it remains near 0 mV or below OEM threshold while exhaust is hot — compare to other bank sensors and OEM limits

Confirm DTC and record freeze frame. Clear codes and reproduce if necessary.
With key on engine off, inspect connector at Bank 1 Sensor 6 for corrosion, pushed-out pins, melted insulation, or soot. Repair/clean as needed.
Back-probe the sensor signal and ground. With engine warmed or under load, observe signal change. If signal stays low while other EGTs rise, suspect sensor or wiring.
Check continuity of signal wire to PCM and for short to ground. Repair any short/open. Verify good ground continuity to chassis/engine.
If harness and connectors test good, substitute a known-good sensor (if available) or bench-test sensor per manufacturer method (apply heat and check millivolt output for thermocouple or resistance change for RTD).
If sensor still fails or readings remain low after replacement, test PCM input for shorts to ground or consult OEM diagnostics for PCM tests.
After repair, clear codes and perform road test under conditions that previously set the code to confirm repair.