P0035 code meaning
Turbocharger/Supercharger Bypass Valve A Control Circuit High
Powertrain system Generic code P00xx codes Check engine light
What P0035 means
The turbocharger bypass valve A is the compressor recirculation (diverter) valve: it connects the pressure side of the compressor with the intake side upstream of the turbocharger. It opens when the throttle closes quickly at high boost, so the compressor does not surge and the compressor wheel keeps its speed for the next acceleration. It is not the wastegate, which bypasses exhaust gas around the turbine and has its own codes. The valve is either electric or a vacuum unit controlled by a solenoid. P0035 means the voltage at the control output is too high, typically a short to battery voltage; on some engines an intermittent break in the harness has also set this code.
P0035 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P0035
- Check engine light on
- Fluttering or hissing when lifting off the throttle if the valve stays closed
- Weak response after gear changes
- Too little boost if the valve stays open
Common causes of P0035
- Most likelyControl wire shorted to battery voltage
- PossibleLoose contact or broken wire, e.g. harness vibrating from heat
- PossibleSolenoid coil faulty
- Less likelyOutput driver in the engine control module faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Turbocharger bypass valveTurbocharger bypass valve wiringEngine control module
What each part of P0035 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 0 | Area: fuel and air metering and auxiliary emission controls. |
| 35 | The exact fault in that area. |
What to do next
- Note P0035 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 P0035
What does P0035 mean?
P0035 means "Turbocharger/Supercharger Bypass Valve A Control Circuit High". The turbocharger bypass valve A is the compressor recirculation (diverter) valve: it connects the pressure side of the compressor with the intake side upstream of the turbocharger. It is a generic code, so it means the same on every make.
Is it safe to drive with P0035?
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 P0035 fail an emissions test?
Yes, it can. P0035 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 P0035 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P0035 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.