P237E

Exhaust Heat Exchanger Exhaust Bypass Valve A Control Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Poor engine performance at idle
Increased fuel consumption
Reduced engine power
Problems with the EGR system

Causes

Short circuit in valve control circuit
Heat exchanger bypass valve malfunction
Wiring harness damage
Connector problems or contact corrosion
Engine control unit (ECU) malfunction

How to Fix

Check valve control circuit integrity
Check the resistance and operation of the bypass valve
Inspect the wiring harness for damage
Check connectors and contacts for corrosion
If necessary, replace the faulty valve or wiring

Related codes

P237F P2380 P2381