P0108
MAP Sensor Circuit High
medium
i Description
The Manifold Absolute Pressure sensor circuit is producing a voltage higher than the expected maximum. The ECU may interpret this as the engine being under heavy load.
? Common Causes
- Short to voltage in MAP sensor wiring
- Faulty MAP sensor
- Disconnected vacuum hose
- ECU fault (rare)
! Symptoms
- Check engine light
- Lean running condition
- Poor acceleration
- Engine pinging/knocking
# Diagnostic Steps
- Inspect vacuum hose connection to MAP sensor
- Test MAP sensor signal voltage
- Check for short circuits in wiring
- Replace MAP sensor if signal is stuck high
⚙ Typical Fix
Reconnect vacuum hose or replace the MAP sensor.
Parts Needed
MAP sensor, Vacuum hose
Estimated Cost
$50-$250
↔ Related Codes
Q Frequently Asked Questions
Use caution. The engine may run lean and knock, which can cause piston damage. Address quickly.
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