What Does P1102 Mean?
The Mass Air Flow sensor signal does not correlate properly with the Throttle Position Sensor signal. The PCM has detected that airflow readings don't match what would be expected based on throttle opening, indicating a sensor or air leak problem.
Common Causes
35%
Contaminated or failing MAF sensor
30%
Air leak between MAF and throttle body
15%
Faulty throttle position sensor
12%
Restricted air filter reducing airflow
8%
Vacuum leak downstream of throttle body
Diagnostic Steps
1
Step 1: Monitor live data comparing MAF sensor and TPS readings at various throttle positions
2
Step 2: Perform visual inspection of all intake components between MAF and engine for leaks
3
Step 3: Check TPS voltage sweep from closed to wide open throttle for smooth transition
4
Step 4: Inspect air filter for excessive dirt or restriction
5
Step 5: Clean MAF sensor and retest for proper correlation with throttle position
6
Step 6: Perform smoke test on intake system if visual inspection reveals no obvious leaks
Estimated Repair Cost
$100 - $500
Parts + labor, varies by vehicle and location
The Mass Air Flow sensor signal does not correlate properly with the Throttle Position Sensor signal. The PCM has detected that airflow readings don't match what would be expected based on throttle opening, indicating a sensor or air leak problem.
The most common cause of P1102 (Mass Airflow Sensor Signal Inconsistent with Throttle Position Sensor) is: Contaminated or failing MAF sensor
Typical repair costs for P1102 range from $100 to $500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to drive but may experience poor throttle response, stalling, or hesitation. Incorrect air-fuel mixture can cause engine damage if operated extensively in this condition.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P1102 to identify the root cause.
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Quick Info
Category
Powertrain
System
Air Intake and Fuel Delivery System
Difficulty
Type
Manufacturer
Recommended Tools
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