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F20 can not communicate with the ecu but the car is driving and the car doesn't open the turbo

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  • Cars & Trucks Master
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May want to begin by checking your battery condition, ECU needs a certain amount of current to work properly. Then check fuses and then current to the ECU.

Posted on Dec 23, 2016

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I have a 1995 dodge ram 1500 5.9 automatice 2 wheel drive and it dumps gas into the carb with a code 37 coming up. could the intake gasket cause this problem? i have replaced the coolant temp sensor, the...


code - 37 TCC brake switch circuit error. this is the torque converter clutch. Open or shorted condition detected in the torque converter part throttle unlock solenoid control circuit
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  • For normally aspirated (non turbo) engines with automatic transmissions, code 37 will be triggered when the Part Throttle Unlock (PTU) solenoid circuit is open or shorted.
  • For normally aspirated cars with manual transmissions, code 37 is sometimes set for no apparent reason.
This is detected when the ECU doesn’t sense near 0vdc or 12vdc at the relay when the solenoid is turned on or off. When code 37 is thrown the power limited light will not be lit and the system will not enter limp mode.

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Turbo cuts out under normal driving


That sounds like turbo overboost, ECU cutting the boost off. when you try and boost again feels like your hitting a brickwall, or when it happends feels like your hitting a brick wall...turning the car off resolves this.

Reset your ecu, disconnect the battery for 30seconds - 1minute.

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Hi i have a 1990 subaru legacy rs BC5 single turbo it seems to blow turbos all the time, the blow off valve opens up on idle even through the boost gauge reads zero and when it drives and hits boost it...


Hello, that is a puzzler, but the blow off valve opening up at an idle is making me think exhaust/catalytic converter restriction causing to much back pressure. Like it can't get the air through fast enough so it's backing up in the intake. I would start my chase there... Let me know if you find any thing...(subyguru)...

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I have fault code 00575 intake manifold pressure on my audi a4 soft top were in engine is this component found


I assume it is a turbo diesel? Then:

Location of the sensor:
- in early cars is in the ECU, with vacuum pipe going from intake maniforld duct to the ECU
- later models on the air intake duct, with wiring going to the ECU.

The fault may often be caused by:

- air leaks in MAP sensor line to the ECU (early ones only) or any of the vacuum control line hoses. This normally due to perished/loose flexi pipes, etc).
- leaks in the air hoses going between turbo/engine/intercooler. Can be spotted by slight oil contamination at the point of leak.

Or it's variable vaine sticking (even intermittently) in the turbo due to contamination, preventing the turbo from performing according to the ECU demand, and hence being 'shut-off' by th ECU

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