P28F9

Exhaust Pressure Too Low Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–167 (est.)

Symptoms

Reduced engine power
Increased fuel consumption
Check Engine Light Is On
Unusual noises from the exhaust system
Dips during acceleration

Causes

Leak in exhaust system
Malfunction of the exhaust gas pressure sensor
Problems with the turbocharger (if installed)
Clogged or damaged catalytic converter
Open or short circuit in the sensor circuit

How to Fix

Visual inspection of the exhaust system for leaks
Checking the exhaust gas pressure sensor
Turbocharger diagnostics (if equipped)
Checking the condition of the catalytic converter
Testing the sensor electrical circuit

Related codes

P28FA P28FB P28FC