Is your Jaguar F-Pace, Range Rover Velar, or Land Rover Discovery Sport struggling with performance issues? If you've scanned the vehicle and found codes P0108-17 or P0098-17, the culprit is likely a small but critical component: the Manifold Absolute Pressure (MAP) Sensor.
In this DIY guide, following the advice from SA Diagnostic's, we’ll show you how to tackle the soot buildup common in these 2.0L Diesel engines and how to verify the fix using the iCarsoft CR ULTRA P.
The MAP sensor is often buried under wiring, but it's the key to proper turbo boost control.Understanding P0108-17: The "Soot" Problem
Unlike the MAF sensor (which measures fresh air), the MAP sensor sits on the intake manifold where exhaust gases are recirculated (EGR).
The Result: It gets covered in oily soot.
- P0108-17: Sensor voltage too high (often blocked port).
- P0098-17: Intake Air Temperature Sensor 2 Circuit High (usually integrated into the same unit).
Related Reading: Fixing MAF Sensor Faults (P0101) on JLR Vehicles.
Video Tutorial: Cleaning vs. Replacing
Watch the technician explain why "cleaning first" is worth a try:
Step-by-Step Fix Strategy
1. Locate and Remove
On the 2.0L Ingenium engine, the sensor is located on the plastic intake manifold.
"It is a bit of a f*** taking these sensors off and these wiring," the technician admits. Take your time and use a mirror if needed to see the bolt.
2. The "Clean & Reset" Attempt
Before ordering a new sensor:
- Spray the sensor tip with Electrical Contact Cleaner.
- Gently remove any visible sludge (do not poke the element inside!).
- Reinstall the sensor.
- Crucial Step: Use your iCarsoft CR ULTRA P to Clear Fault Codes.
- Go for a "thorough drive" to see if the code returns.
Diesel soot can completely block the sensor port, causing P0108 faults.
3. Plan B: Replace with OEM
If cleaning doesn't work, the sensor electronics are likely dead.
Expert Advice: "Buy an original OEM." Cheap sensors often fail to communicate with the sensitive JLR ECU.
Also, if the sensor was heavily clogged, consider checking your EGR Valve and Intake Manifold for blockage.
Deep Dive: Understanding DPF and Soot Buildup on Land Rovers.
Why You Need a Proper Diagnostic Tool
Cleaning the sensor is useless if you don't reset the system. The ECU "remembers" the fault. The iCarsoft CR ULTRA P allows you to:
- Read specific JLR sub-codes (like the -17 extension).
- View Boost Pressure Live Data to verify the sensor is working.
- Clear permanent codes after the repair.
External Resource: Jaguar F-Pace Owner Forums.
Frequently Asked Questions (FAQ)
Is P0108 dangerous for my engine?
It can be. Incorrect boost pressure readings can cause the turbo to over-boost (damaging the engine) or under-boost (causing limp mode and DPF clogging). Fix it promptly.
What causes the soot buildup?
Short journeys and city driving prevent the diesel engine from getting hot enough to burn off carbon deposits. This soot recirculates via the EGR system and coats the MAP sensor.
Does CR ULTRA P work on 2018+ models?
Yes. The CR ULTRA P supports the latest JLR DoIP protocols found in 2017+ vehicles like the F-Pace, Velar, and New Defender. Check full compatibility here.
Don't Let Soot Slow You Down.
Diagnose, clean, and reset with confidence. Get the iCarsoft CR ULTRA P today.
