P2C62 code meaning
O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 3
Powertrain system Generic code P2Cxx codes Check engine light
What P2C62 means
P2C62 points to an open trim circuit at the third oxygen probe of bank 1. Wide-band probes such as Bosch's LSU 4.9 carry a trimming resistor in the connector on a pin of its own (RT/IA) that sets each probe's characteristic; the engine module reads it to scale the pump current, so with the lead broken the signal still moves but with the wrong gain. A third probe sits behind a second catalyst, on diesels typically after the SCR stage. No carmaker documents P2C62 publicly: GM's 3.0L Duramax tables and bulletins use only P2C63, P2C64 and P2C65 for sensor 3. CARB requires circuit continuity checks on oxygen and air-fuel sensors. The front and middle analogues are P2626 and P22B5; low and high faults of this probe are P2C63/P2C64.
P2C62 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2C62
- MIL on, usually without noticeable driving change
- Catalyst or aftertreatment monitors not completing
Common causes of P2C62
- Most likelyTrim line broken or terminal pushed back in the probe connector
- PossibleMoisture or corrosion in the connector of the rear probe
- Less likelyTrimming resistor in the probe connector open (probe replacement)
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Oxygen sensor b1s3Sensor calibration resistorOxygen sensor wiringECM
What each part of P2C62 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| C | Area: hybrid propulsion. |
| 62 | The exact fault in that area. |
What to do next
- Note P2C62 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 P2C62
What does P2C62 mean?
P2C62 means "O2 Sensor Pumping Current Trim Circuit/Open Bank 1 Sensor 3". P2C62 points to an open trim circuit at the third oxygen probe of bank 1. It is a generic code, so it means the same on every make.
Is it safe to drive with P2C62?
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 P2C62 fail an emissions test?
Yes, it can. P2C62 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 P2C62 to fix?
Difficulty: medium. A typical repair takes 0.3 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2C62 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.