What are the symptoms of a damaged intake pressure sensor?
4 Answers
Main symptoms of a faulty intake pressure sensor in a car: 1. Open or short circuit inside the sensor. 2. The sensor output signal does not change with the variation of intake manifold vacuum. 3. The voltage of the sensor output signal is too high or too low, deviating from the normal range. Problems caused by the above faults in the intake pressure sensor: 1. It will cause abnormal fuel injection function of the engine control unit. Symptoms include too rich or too lean mixture, abnormal idle operation or poor acceleration, backfire in the intake manifold or black smoke from the exhaust pipe during engine operation. 2. Engine fails to start, poor engine acceleration, unstable engine idle, intermittent engine stalling.
I'm an experienced driver and have been through a situation where the intake pressure sensor failed. It felt awful—the car often wouldn't start on the first try, sometimes requiring multiple attempts. At idle, the engine shook like it was dancing, and the whole car vibrated at red lights. Acceleration was sluggish, with the car unresponsive when stepping on the gas, making even climbing hills a struggle. What's worse, fuel consumption skyrocketed—from 500 km per tank to just about 450 km, costing me more on gas. The engine warning light was constantly on, signaling an issue. Don’t underestimate these symptoms; delaying repairs could damage the engine. I recommend getting it checked and fixed as soon as possible.
After so many years in auto repair, I've encountered numerous cases of faulty intake pressure sensors. The symptoms are quite obvious: first, the engine struggles to start, and the ECU detects incorrect air-fuel mixture adjustments, leading to ignition issues. The idle becomes unstable, with severe body shaking, and the tachometer needle fluctuates wildly. During acceleration, power output weakens, making the car feel sluggish. Fuel consumption typically increases by 5%-10%, and black smoke may occasionally come from the exhaust pipe. The illuminated check engine light is a key indicator. For routine maintenance, it's important to keep the intake tract clean to prevent dirt buildup on the sensor. Timely diagnosis can save a lot of trouble.
Typical symptoms of a faulty intake pressure sensor include difficulty starting the car or frequent stalling, severe engine shaking at idle, and sluggish acceleration with lack of power when driving. These issues affect daily driving comfort, and unexpected stalling on highways can be particularly dangerous. Fuel consumption also increases. The engine warning light staying on is a clear warning. Safety first—don't ignore these minor problems; get them repaired as soon as possible to avoid more serious failures.
