Map/boost sensor voltage too high
11-04-2013, 12:31 PM
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Map/boost sensor voltage too high
After lurking around here for some time and getting some info relating to problematic vehicles I thought I had better join!
I have a 57 Focus TDCI and I am getting too much voltage at one of the terminals on the map/boost sensor. I should have, respectivey, T.1. 5V , T.2. 0V/earth, T.3. 1.6V-rising to 4.6V when throttle is applied. This last terminal is at a constant 6.9V when the ignition is on and none of them change whether the ignition is on or the engine is running. This is causing P0238 DTC that I can clear but will come back almost immediately. I can drive up to third gear before it comes up on the info display and goes into limp mode. If I stop, turn ignition off and restart it will be clear until third gear again. All wires have been checked back to the ECU pins and I suspect a bad earth somewhere in the module.
Have any of you experienced this problem before, and if so, would you share?
I have a 57 Focus TDCI and I am getting too much voltage at one of the terminals on the map/boost sensor. I should have, respectivey, T.1. 5V , T.2. 0V/earth, T.3. 1.6V-rising to 4.6V when throttle is applied. This last terminal is at a constant 6.9V when the ignition is on and none of them change whether the ignition is on or the engine is running. This is causing P0238 DTC that I can clear but will come back almost immediately. I can drive up to third gear before it comes up on the info display and goes into limp mode. If I stop, turn ignition off and restart it will be clear until third gear again. All wires have been checked back to the ECU pins and I suspect a bad earth somewhere in the module.
Have any of you experienced this problem before, and if so, would you share?
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