P2DEC
Moderate Severity (Level 3)Cylinder 3 Intake Valve Lift Range/Performance
P2DEC usually means cylinder 3 Intake Valve Lift Range/Performance.
Can you still drive with P2DEC?
⚠️Short-distance driving is usually OK, but have this diagnosed within a week to prevent further damage.
Typical repair cost: $80 – $1200
Severity Level 3 — Moderate
This code indicates a moderate issue that may affect vehicle performance and fuel economy. Continued driving is possible in most cases, but prompt diagnosis and repair are recommended to prevent further damage.
Common Symptoms
- System performance degrades under specific conditions (temperature, load, etc.)
- Check Engine Light illuminated
- Engine performance working sometimes, failing other times
- Diagnostic trouble code (DTC) stored in module memory
Possible Causes
- Engine sensor or actuator failing — output signal drifts outside expected range, common with age (80k-120k miles)
- Wiring or connector with intermittent high resistance — causes signal to fluctuate, especially with temperature or vibration
- Mechanical issue with the powertrain/engine system causing the sensor/actuator to operate outside its designed range
- Contamination or debris affecting engine sensor or actuator operation — dirt, oil, or moisture interfering with readings
- Software/calibration issue in the control module — may need reprogramming rather than parts replacement
Common Fixes
- Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($45-94 at shop, free at auto parts store for basic scan)
- Visually inspect the powertrain/engine system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $91 diagnostic fee at shop)
- Replace engine sensor or actuator — slow degradation over time is the most common cause of range/performance codes, especially on vehicles with 100k+ miles ($80-1200)
- Check for vacuum leaks, exhaust leaks, or mechanical issues that could be causing the powertrain/engine system to see out-of-range conditions ($112 diagnostic smoke test + repair)
- Update control module software/firmware — some range/performance codes are fixed by a PCM reflash from the dealer ($190 at dealer)
Estimated Repair Cost
These are estimated costs based on generic repair data. Actual costs may vary depending on your vehicle, location, and labor rates.
Frequently Asked Questions
What does P2DEC mean?
P2DEC stands for "Cylinder 3 Intake Valve Lift Range/Performance". P2DEC usually means cylinder 3 Intake Valve Lift Range/Performance.
Can you drive with P2DEC?
Short-distance driving is usually OK, but have this diagnosed within a week to prevent further damage.
How much does it cost to fix P2DEC?
Repair costs for P2DEC typically range from $80 to $1200, depending on your vehicle make, model, and local labor rates. Common fixes include: Scan vehicle with a professional-grade OBD2 scanner to read all stored codes and freeze frame data — note the conditions when the code set ($45-94 at shop, free at auto parts store for basic scan); Visually inspect the powertrain/engine system wiring harness and connectors — look for chafed wires, melted insulation, green corrosion, loose pins, or rodent damage (often free to check yourself, $91 diagnostic fee at shop); Replace engine sensor or actuator — slow degradation over time is the most common cause of range/performance codes, especially on vehicles with 100k+ miles ($80-1200).
Will P2DEC clear itself?
Explore Repair Costs
Related OBD-II Codes
These codes are in the same range as P2DEC and often share similar causes and fixes.
Worried about repair costs?
Get transparent estimates and verify your mechanic's quote before authorizing repairs.
Related Discussions
See what other car owners are saying about this code and related repairs.
View P2DEC discussions in the community