System: Powertrain (P-Code)
SAE Standard (Generic)
Family: Exhaust Pressure Regulator Vent Solenoid
Code P2170: Exhaust Pressure Regulator Vent Solenoid Control Circuit Low
Diagnostic & Technical Explanation
P2170 (Exhaust Pressure Regulator Vent Solenoid Control Circuit Low) covers the vent solenoid that bleeds off backpressure from an exhaust pressure regulator valve (used to raise exhaust temperature for aftertreatment on some diesels), reporting an open circuit, a short, or an under/over-current condition. Exhaust soot binding the solenoid plunger, a corroded connector exposed to underbody road spray, and a chafed wire near the exhaust heat shield are the most common causes.
First-listed procedure
Rank #1
Clean exhaust soot from pressure regulator vent solenoid
Moderate DIY
This is the first procedure in the authored
consideration order, not a measured cause likelihood. Execute it only when its prerequisites
and diagnostic findings support it. Its cost and labor estimates (where known), the step-by-step procedure and the
remaining 2 procedure(s) are in the licensed dataset. Ordering context.
Full family: Exhaust Pressure Regulator Vent Solenoid
What this page does not show
This page publishes the fault mechanism and the code index. The licensed dataset adds, for
every one of the 15,886 codes, the full authored repair set (56,729 procedures in total)
with the fields deliberately withheld here:
- Procedures 2..n after the first-listed procedure
- Aftermarket parts cost ranges in USD (
est_parts_cost_min/max_usd)
- Professional labor-hour estimates (
est_labor_hours)
- Step-by-step diagnostic and repair instructions
- Replacement-part mappings and catalog lookups
- 6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)