Is it safe to drive with a P0137 code?

Severity is low. Address P0137 sooner rather than later — driving with an active check engine light can worsen the problem or void emissions warranties.

How much does it cost to fix P0137?

Repair costs for P0137 typically range from $40 to $500 in the US, depending on the underlying cause. The most common fix is: Exhaust leak after the catalytic converter.

What are the symptoms of P0137?

CEL. Often paired with P0420 if catalyst-related. Rarely affects drivability.

Check Engine Code

P0137

O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)

Severity: low DIY difficulty: 2/5 Typical cost: $40–$500

What P0137 means

Downstream sensor signal is persistently below the normal switching range. A 'lean' downstream reading often means an exhaust leak between the cat and sensor, or a failed sensor.

Symptoms

CEL
Often paired with P0420 if catalyst-related
Rarely affects drivability

Likely causes (most common first)

Exhaust leak after the catalytic converter
Failed downstream O2 sensor
Wiring fault
Severely degraded catalyst (no oxygen storage)

Can I keep driving?

Low — mostly emissions/economy

Typical repair cost

DIY fixes can start near $40 (parts only). Shop repairs for P0137 typically run up to $500 depending on the underlying cause and vehicle. Start with the most common cause — Exhaust leak after the catalytic converter — before throwing parts at it.

Related codes

P0136P0138 P0140 P0420

Confirm P0137 yourself in 60 seconds

AXLY.pro is a free iPhone app that pairs with any Bluetooth OBD2 adapter to read P0137 and every other stored code, plus live engine data. No subscription.

Download AXLY.pro Free Browse all codes