Fault code P1102 – a step-by-step guide to diagnosing and fixing it

Error code P1102 is displayed and the check engine light is on - what does this mean?

The DTC P1102 is recognized by the OBD system if there is a problem with the mass air flow sensor (MAF) or its circuit. This manufacturer-specific fault code mainly affects the intake system and can have slightly different meanings for different vehicle makes. The EOBD system registers this code if the signal voltage of the mass air flow sensor is outside the expected parameters.

What causes can this error code have?

• Defective mass air flow sensor (MAF sensor)
• Dirty or clogged air filter
• Damaged wiring to the MAF sensor
• Loose or corroded plug connections
• Cracks or leaks in the intake manifold
• Defective engine control unit
• Incorrect sensor calibration after repairs
• Contamination on the MAF sensor element

What symptoms occur in parallel with error code P1102?

• Loss of engine power: Noticeable reduction in engine power, especially during acceleration
• Irregular idling: Engine runs unevenly or stutters when idling
• Increased fuel consumption: Significantly higher consumption than usual
• Starting problems: Difficulty starting the engine, especially in cold weather
• Black smoke: Dark exhaust fumes from the exhaust pipe
• Jerking while driving: Uneven engine performance while driving

How to fix the problem of error code P1102?

• Repairing error code P1102 requires a systematic approach to identifying and eliminating the cause.
• Clean the mass air flow sensor: Use special MAF cleaner to remove contaminants from the sensor element, allow the sensor to dry completely and reinstall it
• Replace air filter: Replace the air filter with a new one to ensure optimum air flow and prevent further contamination of the MAF sensor
• Check wiring and plug connections: Check all cables to the MAF sensor for damage, clean corroded contacts and replace defective cables
• Check the intake system for leaks: Check all hoses and pipes between the air filter and throttle body for cracks or loose connections and replace damaged parts
• Replace MAF sensor completely: If cleaning does not help, install a new mass air flow sensor and carry out a basic adjustment
• Have the engine control unit checked: If the code occurs repeatedly, the control unit should be diagnosed at a specialist workshop and reprogrammed if necessary