P2C79

NOx Adsorber - Sulfur Limit Exceeded

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Increased fuel consumption
Reduced engine power
Check Engine light comes on
Unstable engine idling

Causes

Use of fuels with high sulfur content
NOx adsorber regeneration system malfunction
NOx adsorber contamination
NOx sensor malfunction
Problems with the fuel injection system

How to Fix

Check the quality of the fuel used
Perform forced regeneration of the NOx adsorber
Check the operation of NOx sensors and the regeneration system
If the contamination is severe, replace the NOx adsorber.
Flush the fuel system

Related codes

P2C78 P2C80 P2C81