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DTC P0106
A scan tool indicates a stored DTC P0106 Map sensor performance code, and the vehicle has a lack of power on acceleration. At idle the MAP voltage is slightly higher than normal. During light acceleration the MAP voltage rises close to maximum and continues to rise until it reaches maximum. What is the most likely cause?
A MAP sensor performance code is generated when the measured Manifold Absolute Pressure measured exceeds the allowable range of the calculated value based on the throttle position. The less pressure in the intake manifold results in a lower voltage produced by the MAP sensor. At idle the intake manifold should have a low pressure (vacuum) so the MAP sensor should output lower voltage. Under light acceleration the pressure in the intake should still be relatively low. The higher than normal voltage at idle followed by the very high voltage under light acceleration is the result of a restricted exhaust system. As the exhaust becomes more restrictive the intake manifold pressure will continue to rise at idle producing very little vacuum and will continue to rise above normal as the throttle is opened.
Congratulations to the following shops who answered this question and will be receiving a prize pack!
Vijay at SAI Automotive in Milton, ON
Art at AML Auto Service in East York, ON
TECH CHALLENGE PROMOTION REMINDER
The Tech Challenge question is published in our weekly eNewsletter with an online answer form. Fill out the form with the details of how you would perform the repair to be entered for the chance to win the prize pack. You can also submit a challenge for future Tech Challenges! A draw is conducted with all shops who answered the question correctly and one is selected as a winner for a prize pack.
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