U0651

Lost Communication With EGR Sensor A

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Check Engine Light Is On
Deterioration in acceleration dynamics
Increased fuel consumption
Unstable engine idling
Increased emissions of harmful substances

Causes

EGR sensor A fault
Broken or shorted wiring
Poor contact in the sensor connector
Problems with the engine control unit
Corrosion or oxidation of contacts

How to Fix

Check the integrity of the wiring and connectors of the EGR sensor A
Check the voltage and resistance of the sensor
Clean sensor contacts and connectors
Replace EGR sensor A if necessary
Check and update the control unit software if necessary

Related codes

U0652 P0401 P0403