P237CExhaust Heat Exchanger Bypass Valve A Control Circuit Open
An open circuit is detected on the control line for the bypass flap A of the exhaust heat exchanger. This valve directs exhaust either through the heat exchanger (cold start, fast warm-up) or around it (normal operation). Without working control the warm-up strategy is impaired and emissions during cold start increase.
Can I keep driving? With caution
You can drive to the shop, but do not postpone the repair. The problem may worsen and damage other components.
Sistema Afectado
Motor · Powertrain
La falla pertenece al grupo motopropulsor (motor y gestión electrónica).
Espacio para vendedores de repuestos
Aún no hay un anunciante en este espacio.
Possible Causes
The components or conditions that trigger this code
- 1Open in harness or connector Actuator solenoid or motor winding open Pin pushed back out of connector body
How to Fix It — Step by Step
Recommended diagnostic and repair procedure
- 1Difficulty: medium. Estimated time: 1-2.5 hours. Estimated cost: €200-€
- 2Professional repair recommended
Note: This information is for general reference. For precise diagnostics and safety repairs, always consult a certified mechanic.
Estimated Cost
Approximate range in USD (varies by region and shop)
Varies by diagnosis
* Diagnosis only: $50–$150
Quick Info
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