P1153Fuel & Air Metering
HO2S Insufficient Switching (GM, Bank 2 Sensor 1)
P1153 is the Bank 2 counterpart of P1133 on GM vehicles. The upstream oxygen sensor on Bank 2 Sensor 1 is not switching fast enough.
🚗 Yes, short-term, but expect worse fuel economy on that bank.
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🎯 Top Causes, Ranked by Likelihood
#1Aged or failing upstream O2 sensor Bank 2$60-$300
A slow sensor cannot switch fast enough.
#2Exhaust leak near the Bank 2 sensor$50-$400
Leaked air skews the reading.
#3Wiring or heater circuit fault$50-$300
A bad heater or wiring slows response.
🩺 Common Symptoms
- Check engine light
- Reduced fuel economy
- Possible rough running
- Failed emissions test
💰 Repair Cost: DIY vs Shop
📋 Free OBD2 Code Cheat Sheet
The 50 most common codes with likely cause and DIY fix cost. Sent once, no spam.
🔧 How to Diagnose P1153
1Inspect the Bank 2 sensor wiring and connector
2Check for exhaust leaks near the sensor
3Verify heater circuit operation
4Replace the Bank 2 upstream O2 sensor if needed
❓ Frequently Asked Questions
Can I drive with P1153?
Short-term yes, but it hurts fuel economy and emissions. Fix it soon.
Is P1153 a GM code?
Yes, P1153 is a GM code for insufficient HO2S switching on Bank 2 Sensor 1.
What fixes P1153?
Replacing the Bank 2 upstream O2 sensor resolves most cases after ruling out exhaust leaks and wiring.
🔗 Related Codes
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