P2C19B Camshaft Profile Actuator Position Sensor B Circuit High Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P2C19 closes the sensor B group on the exhaust camshaft of bank 1: the feedback circuit of GM's exhaust Hall sensor 2 is shorted to a voltage source. For the L3B the ECM checks while the output is off; a path of at most 0.5 ohm to controller power, reported four times in five with supply over 11 V, gives a Type A code with the MIL on in the first trip (19OBDG03D, 25OBDG03B). P2C19 sits in the main code list of PIT5677 and 21-NA-149, which blame L3B harness damage at the camshaft carrier cover, at the base of the air cleaner box, or near the alternator bracket and the stud of the left front spring. Since no third exhaust Hall sensor exists on this engine, P2C19 is the last exhaust feedback code GM uses. Open: P2C16, ground: P2C18.
- What you may notice
- MIL on in the first drive
- Exhaust lift switching disabled
- With extensive harness damage, stalling, no crank or blown fuses
- Likely causes
- LikelyHarness chafed at generator bracket or coil spring stud, line touching a live wire (GM 21-NA-149)
- PossibleExhaust actuator 2 shorted internally to supply
- RareECM output stage faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.