P1136 — O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 1

What Does P1136 Mean?

P1136 is a manufacturer-specific diagnostic trouble code: O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 1. This code applies to BMW, VOLKSWAGEN, MAZDA, BUICK, CADILLAC vehicles. Unlike generic OBD-II codes, manufacturer-specific codes are defined by the vehicle maker and may only apply to certain makes and models.

Symptoms of P1136

⚠️ Check Engine Light (MIL) illuminated
⚠️ O2 Sensor Heater reading stuck at maximum value
⚠️ Related system operating erratically or in default mode
⚠️ Reduced engine performance

Common Causes

🔍 Short to voltage in O2 Sensor Heater wiring harness
🔍 Corroded or water-damaged O2 Sensor Heater connector
🔍 Faulty O2 Sensor Heater outputting maximum voltage
🔍 Damaged wiring rubbing against metal components
🔍 ECM/PCM internal fault (rare)

Frequently Asked Questions

What does P1136 mean?

P1136 indicates: O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 1. The vehicle's computer has detected that the O2 Sensor Heater is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code P1136?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with P1136 for extended periods may cause additional problems.

How much does it cost to fix P1136?

Repair costs for P1136 typically range from $20 to $300, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect and repair O2 Sensor Heater wiring for short to voltage
🔧 Clean or replace corroded O2 Sensor Heater connector
🔧 Replace faulty O2 Sensor Heater

1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

P1136: O2 Sensor Heater Circuit High Voltage Bank 1 Sensor 1