P264C code meaning
"A" Rocker Arm Actuator Position Sensor Circuit Low (Bank 1)
Powertrain system Generic code P26xx codes Check engine light
What P264C means
P264C is set when the signal from the position sensor of rocker arm actuator A, bank 1, sits below its valid window. Typical electrical explanations are a short of the signal wire to ground, a lost 5 V reference, or a sensor that has failed internally. CARB lists such out-of-range checks for every sensor in a lift or timing system under the comprehensive component rules. No carmaker publishes P264C with a threshold; it would only appear on engines whose actuator carries position feedback, such as motor-driven continuous lift designs. Expect the controller to stop adjusting lift, with weaker pull and higher consumption; P264D is the high-side counterpart.
P264C at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyHard
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P264C
- MIL on
- Weaker pull, lift no longer varied
- Higher fuel consumption
Common causes of P264C
- Most likelySignal wire shorted to ground
- Possible5 V sensor supply missing
- PossiblePosition sensor failed internally
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Rocker arm position sensor a b1Wiring harness
What each part of P264C means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 6 | Area: computer (engine control module) and output circuits. |
| 4C | The exact fault in that area. |
What to do next
- Note P264C 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 P264C
What does P264C mean?
P264C means ""A" Rocker Arm Actuator Position Sensor Circuit Low (Bank 1)". P264C is set when the signal from the position sensor of rocker arm actuator A, bank 1, sits below its valid window. It is a generic code, so it means the same on every make.
Is it safe to drive with P264C?
Drive gently and only to a workshop. With P264C the car can go into limp mode (reduced power) to protect itself.
Will P264C fail an emissions test?
Yes, it can. P264C 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 P264C to fix?
Difficulty: hard. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P264C clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.