P237D

Exhaust Heat Exchanger Exhaust Bypass Valve A Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Deteriorating fuel economy
Unstable engine operation at idle
Problems with the EGR system

Causes

Open or short circuit in valve control circuit
Heat exchanger bypass valve malfunction
Problems with the relay or circuit fuse
Corrosion or poor contact in connectors
Engine control unit (ECU) malfunction

How to Fix

Check valve control circuit integrity
Check valve resistance and operation
Inspect connectors and contacts for corrosion
Check fuses and relays of related circuits
If necessary, replace the heat exchanger bypass valve

Related codes

P237E P237F P2380