P1307 Boost Calibration Low
The P1307 code is a Ford-specific diagnostic trouble code indicating that the boost calibration value is below the expected range. The Powertrain Control Module (PCM) detects that the actual boost pressure does not match the calibrated value during the learning process, or the feedback signal from the forced induction system is below the programmed threshold. This code is set when the PCM cannot properly calibrate the boost control system, affecting engine performance and turbocharger efficiency.
01. Most Common Causes
- Faulty or stuck wastegate control valve
- Failing or out-of-calibration MAP/boost pressure sensor
- Insufficient vacuum to wastegate actuator or deteriorated vacuum hoses
- Leak in intercooler hoses or forced induction intake system
- Excessive turbocharger shaft or compressor wear
- Faulty wastegate control solenoid (VGT/VNT on Ford diesels)
- PCM software update needed or corrupted calibration memory
- Restricted exhaust system affecting turbo flow
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Reduced engine power and poor acceleration
03. Step-by-Step Diagnosis
Scan for additional codes and freeze frame data
Inspect wastegate actuator and control valve for proper operation
Check MAP/boost sensor readings with a scan tool
Test vacuum supply to wastegate actuator and inspect hoses
Perform a boost pressure test to identify intake leaks
Inspect turbocharger for shaft play or damage
Check exhaust system for restrictions
Update PCM software if available
1. Frequently Asked Questions
Is it safe to drive?▼
Driving with this code is not recommended as it can cause reduced engine performance and potential damage to the turbocharger or engine. Have the vehicle diagnosed and repaired promptly.
How much does it cost to fix?▼
Repair costs vary widely depending on the root cause, ranging from $100 for a vacuum hose replacement to $2,500+ for a turbocharger replacement.