Is it safe to drive with a P0151 code?

Severity is medium. Address P0151 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 P0151?

Repair costs for P0151 typically range from $30 to $300 in the US, depending on the underlying cause. The most common fix is: Exhaust leak upstream of the sensor.

What are the symptoms of P0151?

CEL. Rough running. Reduced economy.

Check Engine Code

P0151

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

Severity: medium DIY difficulty: 2/5 Typical cost: $30–$300

What P0151 means

Bank 2 twin of P0131. Upstream sensor signal stuck below expected switching range.

Symptoms

CEL
Rough running
Reduced economy

Likely causes (most common first)

Exhaust leak upstream of the sensor
Vacuum leak
Failed O2 sensor
Wiring short to ground

Can I keep driving?

Medium — drivable but fix soon

Typical repair cost

DIY fixes can start near $30 (parts only). Shop repairs for P0151 typically run up to $300 depending on the underlying cause and vehicle. Start with the most common cause — Exhaust leak upstream of the sensor — before throwing parts at it.

Related codes

P0131P0152P0153 P0174

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