P1795 Throttle Position Sensor Mismatch
P1795 is a Ford-specific diagnostic trouble code indicating a mismatch between the throttle position (TP) sensor's electrical signal and the actual mechanical position of the throttle plate. The powertrain control module (PCM) detects that the throttle body's mechanical position does not correspond to the expected electrical signal. This can be caused by internal sensor wear, carbon buildup on the throttle valve, or mechanical issues in the throttle return mechanism.
01. Most Common Causes
- Worn or damaged throttle position sensor
- Carbon buildup in the throttle body restricting movement
- Misadjusted, worn, or sticking throttle cable
- Faulty accelerator pedal return mechanism
- Corroded or loose electrical connections at the TP sensor connector
- Worn throttle shaft
- Damaged throttle body return spring
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Poor acceleration or hesitation
- Erratic idle or stalling
- Reduced fuel economy
03. Step-by-Step Diagnosis
Scan for codes and verify P1795 is present
Inspect TP sensor connector for corrosion or damage
Check throttle cable adjustment and free movement
Clean throttle body to remove carbon deposits
Test TP sensor voltage signal with a multimeter
Inspect throttle return spring and shaft for wear
1. Frequently Asked Questions
Is it safe to drive?▼
You can drive short distances, but the vehicle may experience reduced performance and drivability issues. It's best to diagnose and repair promptly to avoid further damage.
How much does it cost to fix?▼
Repair costs typically range from $150 to $400, depending on whether the sensor, throttle body cleaning, or cable adjustment is needed.