Question about Cars & Trucks
To restart truck, we wiggle connector to MAP sensor, truck will start and engine power is restored until the next episode. MAP sensor has been replaced. What else could it be?
Sounds as if it is related to a Chev. This is usually caused by a correlation problem between the accelerator pedal sensor and the throttle plate assembly. The most common repair is to replace the throttle plate/motor assembly unit
Posted on Apr 25, 2015
Testimonial: "We got a P2135 code. Ordered a whole throttle body unit and will replace this afternoon. Fingers crossed. Upon further inspection, we did notice a strange noise from the throttle plate so replacing the unit was probably our best option. Thank you!"
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Posted on Jan 02, 2017
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Nov 20, 2013 | 2006 Pontiac Grand Prix
Jan 03, 2013 | 2006 Pontiac G5
First, using your scan tool with the Key on and engine running, monitor the MAP Sensor voltage. If it is reading less than 5 volts, turn engine off, unplug the MAP sensor and, using a DVOM (Digital Volt/Ohm Meter) check for 5Volts on the 5 Volt reference circuit.
1. If there is not 5 Volts on the reference circuit, then check for the reference voltage at the PCM connector. If it is present at the PCM connector but not the MAP connector, repair the open in the wiring loom between the PCM and MAP harness connector.
If 5 Volt reference is NOT present at the PCM connector, check powers and grounds of PCM and repair/replace as needed.
2. If you have a 5 Volt reference at the MAP connector, jumper the 5 volt reference circuit to the signal circuit. Now check the MAP voltage on the scan tool. It should be 4.5 to 5 Volts. If it is, replace MAP sensor. If not, repair open/short in the signal circuit wiring and re-check.
3. If all appears okay, perform a wiggle test. Start engine and manipulate the harness, connector and tap on the MAP sensor. Note any changes in voltage or engine speed. Repair connector, harness, or sensor as needed.
4. If the wiggle test checks out, use a vacuum pump (or just use your lungs) to draw a vacuum on the MAP sensor vacuum port. As you add vacuum the voltage should decrease. With no vacuum, the MAP sensor should read approximately 4.5 volts. If there is no change in MAP sensor reading on the scan tool, replace MAP sensor.
Sep 05, 2011 | 2001 Ford Focus
Fig. Fig. 1: Manifold absolute pressure (MAP) sensor wiring schematic-1993-95 models
Fig. Fig. 2: Manifold absolute pressure (MAP) sensor connector terminal pin locations-1993-95 models
Before testing any electrical component, inspect the wiring and connectors for damage. Also wiggle the connectors to ensure a that they are firmly engaged. When testing the sensor, use a high input impedance digital volt-ohmmeter. Insert the tester leads through the back of the connector. Do not disconnect the electrical harness.
Fig. Fig. 6: On the 3.5L engine, the MAP sensor is threaded into the left side of the intake manifold plenum
The MAP sensor is located in the rear of the intake manifold plenum on the 3.3L engine. On the 3.5L engine, the MAP sensor is threaded into the left side of the intake manifold plenum.
Jul 05, 2011 | 1995 Chrysler New Yorker
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Feb 28, 2010 | 1997 Pontiac Grand Prix
Nov 13, 2009 | 1993 Chevrolet Lumina
Jul 21, 2008 | 1994 Pontiac Bonneville
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