P0152 code meaning
O2 Sensor Circuit High Voltage Bank 2 Sensor 1
Powertrain system Generic code P01xx codes Check engine light
What P0152 means
The oxygen sensor before the catalytic converter on bank 2 (sensor 1) is the main control sensor for the mixture. It is either a switching sensor (about 0.1 V lean to 0.9 V rich) or a wide-band sensor that works with a pump current evaluated by an interface chip. Bank 2 exists only on engines with two exhaust manifolds. P0152 is the bank 2 counterpart of P0132. Switching sensors: GM above 1050 mV (100 of 125 samples, after warm-up), Ford above 1.1 V for 10 s – a reading the sensor cannot produce itself, so heater or battery voltage on the signal wire is the usual cause; GM also reads an open wire as high. Wide-band sensors: a sensor wire shorted to voltage. P0152 together with P0158 points to a shared short in the bank 2 harness. Two trips. A stored code usually switches mixture control to open loop and suspends adaptation and converter monitoring.
P0152 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairAfter a drive cycle
Symptoms of P0152
- Check engine light on
- Higher consumption, possibly rough running (no mixture control)
- Higher CO/HC values
- Often with P0158 or P0155
Common causes of P0152
- Most likelySignal wire shorted to the heater supply or battery voltage (melted or chafed harness)
- Most likelySensor faulty internally (heater-to-signal short)
- PossibleOpen or high-resistance signal or ground wire (GM reads its bias voltage)
- Less likelySensor contaminated by silicone, coolant or oil
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Oxygen sensor bank2 sensor1Oxygen sensor wiringEngine control module
What each part of P0152 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 1 | Area: fuel and air metering. |
| 52 | The exact fault in that area. |
What to do next
- Note P0152 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P0152
What does P0152 mean?
P0152 means "O2 Sensor Circuit High Voltage Bank 2 Sensor 1". The oxygen sensor before the catalytic converter on bank 2 (sensor 1) is the main control sensor for the mixture. It is a generic code, so it means the same on every make.
Is it safe to drive with P0152?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0152 fail an emissions test?
Yes, it can. P0152 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P0152 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0152 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.