P1108 Jaguar Code - MAP Sensor Circuit Comparison Too High Voltage
Quick Answer
The Manifold Absolute Pressure (MAP) sensor responds to pressure changes in the intake manifold. Common causes include Faulty Manifold Absolute Pressure (MAP) sensor, Manifold Absolute Pressure (MAP) sensor harness is open or shorted, Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1108 Jaguar indicates MAP Sensor Circuit Comparison Too High Voltage.
- Common causes
- Common causes include Faulty Manifold Absolute Pressure (MAP) sensor, Manifold Absolute Pressure (MAP) sensor harness is open or shorted, Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Code P1108 Jaguar Description
- 5-volt reference circuit
- Low reference circuit
- MAP sensor signal circuit
The Powertrain Control Module (PCM) supplies 5 volts to the MAP sensor on the 5-volt reference circuit. The PCM also provides a ground on the low reference circuit. The MAP sensor provides a signal to the PCM on the MAP sensor signal circuit which is relative to the pressure changes in the manifold. The PCM should detect a low signal voltage at a low MAP, such as during an idle or a deceleration. The PCM should detect a high signal voltage at a high MAP, such as the ignition is ON, with the engine OFF, or at a wide open throttle (WOT). The MAP sensor is also used in order to determine the barometric pressure (BARO). This occurs when the ignition switch is turned ON, with the engine OFF. The BARO reading may also be updated whenever the engine is operated at WOT. The PCM monitors the MAP sensor signal for voltage outside of the normal range.
What are the Possible Causes of the DTC P1108 Jaguar?
- Faulty Manifold Absolute Pressure (MAP) sensor
- Manifold Absolute Pressure (MAP) sensor harness is open or shorted
- Manifold Absolute Pressure (MAP) sensor circuit poor electrical connection
How to Fix the DTC P1108 Jaguar?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1108 Jaguar code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P1108 Jaguar Code
1. What does the OBDII code P1108 mean for a Jaguar?
P1108 indicates that the MAP sensor circuit is reading a voltage that is too high compared to expected parameters.
2. What are the common symptoms of the P1108 code in a Jaguar?
Symptoms may include poor engine performance, reduced fuel efficiency, rough idling, difficulty starting, and the Check Engine Light being illuminated.
3. What causes the P1108 code to appear in a Jaguar?
Potential causes include a faulty MAP sensor, wiring or connection issues in the MAP sensor circuit, a vacuum leak, or a failing engine control module (ECM).
4. Can a vacuum leak trigger the P1108 code in a Jaguar?
Yes, a vacuum leak can cause incorrect readings from the MAP sensor, leading to the P1108 code.
5. How do I diagnose the P1108 code in my Jaguar?
Start by checking the MAP sensor and its wiring for damage, test the sensor's voltage output with a multimeter, and inspect for vacuum leaks or intake manifold issues.
6. Can a faulty MAP sensor cause the engine to stall in a Jaguar?
Yes, a faulty MAP sensor can provide incorrect data to the ECM, potentially causing stalling or rough idling.
7. Is it safe to drive a Jaguar with the P1108 code?
Driving with the P1108 code is not recommended as it can lead to reduced engine performance and potential long-term damage.
8. How do I fix the P1108 code on a Jaguar?
Repairs may involve replacing the MAP sensor, fixing damaged wiring or connectors, addressing vacuum leaks, or reprogramming the ECM if necessary.
9. How much does it cost to repair a P1108 code on a Jaguar?
The cost can vary, but replacing the MAP sensor typically ranges from $100 to $300, including parts and labor.
10. Can a dirty air filter cause the P1108 code in a Jaguar?
While unlikely, a severely clogged air filter can impact air pressure readings and contribute to sensor issues indirectly.
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