Faulty Signal

ECM-130A INTAKE AIR LEAK
FAULTY SIGNAL

Checking components, intake system



Check the intake system for leakage. In particular, check the hoses and hose connectors between the mass air flow (MAF) sensor and the throttle unit. Check for leakage.

Check that the intake air temperature (IAT) sensor and boost pressure sensor are correctly installed. Check for air leakage around the components.

Note! Even extremely small air leaks can cause this diagnostic trouble code (DTC) to be stored.

Check the crankcase ventilation for blockage. In particular check the positive crankcase ventilation (PCV) valve on turbocharged engines.

Hint: Indications of a blocked positive crankcase ventilation (PCV) valve include contamination or oil on components in the intake system.

If the PCV valve/crankcase ventilation is blocked, check the electronic throttle unit shutter for dirt. Remedy as necessary.

Remedy as necessary.

Other information
- To check for air leakage, Check For Air Leaks In the Intake System


Verification



Hint: After carrying out the repair, check that the fault has been remedied.
- Ignition off.
- Reinstall the connectors, components etc.
- Ignition on.
- Read off and make a note of the adaptation value.
- Start the engine. Increase the engine speed (RPM) a couple of times.
- Read off the adaptation value and check that the adaptation value approaches 1.

Does the adaptation value approach 1?
Yes - Testing Complete
No - Continue below.


Fault-tracing information
The fault should have been detected and remedied. As this is not the case fault-tracing has failed. Exit fault tracing for this diagnostic trouble code (DTC) or make another attempt.