P2237Exhaust leak, Oxygen sensor failure, Powertrain Control Module (PCM) failure, Wiring issue
The pumping current line of the wide-band lambda sensor on bank 1 sensor 1 is unable to operate. Wide-band sensors regulate exhaust oxygen to a reference cell via this pumping current — without it, AFR cannot be measured.
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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.
Symptoms You Will Notice
What you may observe when this code appears
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Possible Causes
The components or conditions that trigger this code
- 1Pumping current line open
- 2Wide-band sensor failed
Estimated Cost
Approximate range in USD (varies by region and shop)
Varies by diagnosis
* Diagnosis only: $50–$150
Quick Info
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