P2170 code meaning
Exhaust Pressure Regulator Vent Solenoid Control Circuit Low
Powertrain system Generic code P21xx codes Check engine light
What P2170 means
P2170 reports the control line of the exhaust pressure regulator vent solenoid pulled toward ground. Jaguar Land Rover uses it for the solenoid of the active exhaust valve; its March 2018 shop foreman call lists P2170-11, meaning the line is grounded, on 2018 Discovery Sport and Evoque with active exhaust. On 2018 and 2019 Evoque, Discovery Sport and E-Pace with the 2.0 Ingenium gasoline, MIL and sometimes a restricted performance message appear. JLR suspected high resistance while the valve is switched and asks for a circuit check, a check that the flap moves freely by hand and that the heat shield sits centred on the valve; a cold-soak test in a freezer can reproduce a sticking valve. New PCM software cured unexpected valve operation (JLRTB02020NAS2) and drops the power limitation.
P2170 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.2 to 3 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P2170
- Check engine lamp on
- Restricted performance message on some models
- Exhaust valve heard clicking at start-up
Common causes of P2170
- Most likelyPCM software with an overly sensitive fault strategy, fixed by an update
- PossibleExhaust flap stiff, often from a misaligned heat shield or cold weather
- PossibleControl wire chafed through to ground near the exhaust
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Exhaust pressure regulatorWiring harnessEngine control module
What each part of P2170 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 1 | Area: fuel and air metering. |
| 70 | The exact fault in that area. |
What to do next
- Note P2170 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 P2170
What does P2170 mean?
P2170 means "Exhaust Pressure Regulator Vent Solenoid Control Circuit Low". P2170 reports the control line of the exhaust pressure regulator vent solenoid pulled toward ground. It is a generic code, so it means the same on every make.
Is it safe to drive with P2170?
Drive gently and only to a workshop. With P2170 the car can go into limp mode (reduced power) to protect itself.
Will P2170 fail an emissions test?
Yes, it can. P2170 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 P2170 to fix?
Difficulty: medium. A typical repair takes 0.2 to 3 hours of work. This is a job for a workshop.
Will P2170 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.