P2D1C

Cold Start EGR A/B Ratio Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine operation during cold start
Increased fuel consumption
Check Engine Light Illuminates
Reduced engine power
Dips during acceleration

Causes

Dirty or faulty EGR valve
Problems with the electrical circuit of the EGR sensors
Malfunction of one of the EGR sensors
Contamination of EGR system channels
Control unit software error

How to Fix

Check the condition of the EGR valve and its channels
Check electrical connections and integrity of wires to sensors
Test EGR sensors using diagnostic equipment
Clean or replace EGR valve if necessary
Reset the error and check if it returns

Related codes

P0401 P0403 P0404