Question about 2000 Alfa Romeo 156

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53 plate 1.9 16v jtdm motor system failure,limp mode,loss of power any ideas, oh boot open light on when its closed

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Sensor for boot gone away simple job in the boot lock is located or next to it about engine explain wat s limp mode? is not starting at all?

Posted on Jul 18, 2009

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After running my ford 500 2006 about 1 and 1/2 hrs the engine light , wrench light goes on and the motor reves up and the gas pedal losses power


need to have vehicle scanned for trouble code most auto stores offer this service for free the loss of power is limp mode the vehicle is protecting itself

Apr 27, 2017 | Ford Cars & Trucks

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I have Ford Focus 1.0 EcoBoost 2012. I have experienced an intermittent problem where I get a loss of power (turbo not working)and car goes into "limp" mode. No warning light appears and the car


thats sounds like a possible boost control solenoid failure.when the boost solenoid fails it wont activate a warning light and because of the lack of boost the engine computer fail safe feature will put it in limp mode in order to keep the driver from harming the engine

Jul 21, 2016 | 2012 Ford Focus

1 Answer

2007 pontiac grand prix


The limp mode , reduced power mode has to do with the electronic throttle control . Some good videos on youtube how it works an how to diagnose . Electronic Throttle Control ETC System .Now as far as the parking lights staying on ,the relay contacts are probably stuck closed causing the lights to stay on .

Apr 07, 2016 | 2007 Pontiac Grand Prix

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Hi my transit van t350 53 plate has went into limp mode after engine change can you tell me what's up


Sorry dealer only to read the software ,unlike the old V4 2.0 litre or the OHC engine .then the good old workhorse with the 2.4 york diesel these vans have become so complicated with the electronics i am at a loss .I remember when these vans first hit the market and they were great for bank robberies as they outran the police noddy cars ,and put a zodiac or capri V6 engine in one ?? with a mkII zodiac diff unit and on the motorway -- well fast

Dec 17, 2013 | Cars & Trucks

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Flashing code 15,54,83


Fault Code 15

SynopsisDescription: No speed/distance sensor signal Power loss light: Off Limp-in mode: None
Possible CausesBad connector or wiring - Check the connector at the sensor and on the wiring harness near the fuel rail for corroded contacts or broken or melted wires. Check the wiring for continuity.Speed/distance sensor failure - If you have a 1992 or earlier transmission, these sensors are prone to failure. See the Hall Effect Speed/Distance Sensor Conversion page to see if you can repair this problem once and for all. The sensor is located on the transmission on top of the long casting where the right axle connects.
Diagnostic MethodTrigger Parameters
- Throttle has been closed for 7 seconds - Engine speed 768 rpm above target idle speed - Speed sensor not producing a signal

Results If Component FailsFault code 15 is stored, but there is no "limp-in" mode for this fault code and the power loss light does not turn on. Any pulses from the sensor are considered valid.

Fault Code 54

SynopsisDescription: No fuel injector sync pickup signal during engine rotation Power loss light: On Limp-in mode: Logic module will guess at injector timing
Possible Causes:Bad connection or wiring - Check the wiring and connections between the hall effect sensor (located underneath the distributer cap) and the logic module. Check the continuity of the two 3 conductor cables coming out of the sensor--these are prone to fatiguing and breaking inside the insulation where they exit the sensor if the cables are not properly tied down. You may be able to resolder them. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.
Hall effect sensor failure - Check the two, flat 3 conductor cables coming out of the sensor. These often fatigue where they exit from the sensor. Upon replacing the sensor, make sure the cables are clipped or tied to the distributor cap shroud (or elsewhere) so they do not swing around.
Diagnostic MethodTrigger Parameters

- Engine cranking or running (signal coming from ignition reference sensor) - No signal from the fuel injector sync pickup sensorResults If Component Fails
Fault code 54 is stored. The engine will stall and will not start.

Hope helps.

Mar 14, 2012 | 1993 Chevrolet C1500

1 Answer

Grand cherokee error code 13,16,24,27,36,51


Hi there: Definetivelly you have a problem with emission and injection syste,, check this code descriptions...

DTC 13 - MAP (Manifold Absolute Pressure) sensor pneumatic failure: sensor output does not change
Power loss light: On
Limp-in mode: TPS and engine speed used as an indication of manifold pressure

Possible Causes:
Broken or disconnected vaccum line - Check the vaccum line leading from the MAP sensor. On '87 and later engines, the sensor is located on the right shock tower and the vaccum line often gets pulled or pushed off. Replace the entire line with a piece of 1/8" I.D. vaccum hose making sure to provide enough slack in the line.

Bad Baro-read solenoid - The barometric read solenoid may not be operating. Try bypassing the solenoid, connecting the MAP sensor directly to the manifold to see if the engine runs better (this may not prevent the code 13, however). If not accompanied by a code 37, you can try to repair or replace the solenoid. See the Understanding Solenoids page for information about how to test and repair solenoids.

Moisture in MAP sensor - If this mostly occurs old cold weather, then you may have water that is freezing inside the sensor. This is a common problem on vehicles that have the sensor located on the logic module. Remove the sensor and bring inside to warm up. Shake any droplets out of the sensor and set it in a warm, dry place for a day or so. Don't try to take the sensor apart because you may destroy it. Check all your vaccum lines because a vaccum leak would be the most likely cause of water entering the system. If your MAP sensor is located on or near the logic module, you may wish to consider moving it under the hood on the right shock tower. All 1987 and later models were set up this way to prevent moisture collection in the MAP sensor.

Pinhole leak in Fuel Pressure Regulator - Occasionally, a small leak will develop in the fuel pressure regulator diaphram that allows fuel to enter the vacuum system. This upsets the response of the vacuum system, triggering this code. Check for the presence of fuel in the vacuum line to the fuel pressure regulator. If fuel is present, replace the regulator.

MAP sensor failure - A bad MAP sensor will usually cause a code 14, so this is not as likely to be the cause of a code 13. But if it comes down to it, replace the MAP sensor which is located on the right shock tower on '87 and later vehicles or in the logic module on previous vehicles. Damage from freezing water can destroy a MAP sensor.

DTC 16 - Loss of battery voltage detected with engine running
Power loss light: On
Limp-in mode: 25% alternator field coil duty cycle

Possible Causes:
Blown fusible link to power module (or SMEC) - Check the only white fusible link (may look grey if dirty) by tugging on it. A good link will feel solid while a blown link will stretch like a rubber band. It is the white link on the two-link circuit (not the four or five link circuit). This link supplies power to the ASD relay and the voltage sense input on the logic module (may be accompanied by a code 42). See the Fusible Links page for more details.

Bad connection or wiring - Check the wiring and connections between the alternator and the battery, power module and the alternator field coil, and the voltage sense line through the power and logic modules.

Alternator failure or bad voltage regulator circuit - See the Diagnosing Your Charging System page.

Diagnostic Method
Trigger Parameters
- 60 seconds after engine startup
- Voltage sense input is below 8.5V
Results If Component Fails
If the voltage sense input is between 4V and 8.5V, the logic module will full-field (100% duty cycle) the alternator field coil for 20 seconds. If the voltage sense input is still below 8.5V, the system enters limp-in mode, the power loss light is turned on, a fault code 16 is stored, and the alternator field coil driver will enter a fixed, 25% duty cycle.

If the voltage sense input is below 4V, the system enters limp-in mode, the power loss light is turned on, and a fault code 16 is stored. The alternator field coil driver will enter a fixed, 25% duty cycle to prevent overcharging of the battery, but allow the vehicle to operate.


DTC 24 - Throttle position sensor (TPS) signal is out of range
Power loss light: On
Limp-in mode: MAP sensor is used as an indication of thottle position

Possible Causes
TPS failure - The TPS is located on the throttle body on the opposite side of the throttle cable. Turn the engine off, disconnect the sensor and test it by connecting an ohmmeter (preferably an analog one) between the center and either outside pin of the sensor. Slowly open the throttle all the way and then slowly close it again. The ohmmeter should show a constant, smooth change in resistance as the throttle is moved. If there are any jumps in reading or no change in reading at all, replace the sensor. If the sensor seems ok, reconnect the sensor cable and turn the ignition on. One outside wire should be 5V, the other ground. The voltage on the center wire should vary as the throttle is opened (about 0V closed, 3V wide open). If power or ground is not present, check the wiring.

Bad connection or wiring - Check the wiring and connections between the sensor and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease. Check connections if there is no power or ground, or for shorts if there is power and resistance, but no output.

Diagnostic Method
Trigger Parameters
- Sensor output less than 0.16V or greater than 4.7V
Results If Component Fails
Fault code 24 is stored, the power loss light is turned on, and the logic module will enter limp-in mode. The logic module will then use the MAP sensor as an indication of the thottle position. A MAP sensor voltage less than 2.0V is considered closed throttle and a MAP sensor voltage greater than 2.0V is considered wide open throttle (WOT).


DTC 27 - Injector driver circuit 2 open or shorted
Power loss light: Off
Limp-in mode: None

Possible Causes
Bad connection or wiring - Check the wiring and connections to injectors 3 and 4 in the injector harness (above the fuel rail) and between the harness and the power module (or SMEC) and the injector contol lines between the logic module and power module. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

Injector driver transistor failure - Check the injector signals coming from the power module (or SMEC). They should rise to about 12V when the injector is off and drop close to 0V when the injector is on. If they are out of spec, you may need to replace the power module.

Diagnostic Method
Trigger Parameters
- Near 0V or near 12V not detected when the injector driver is turned on or off, respectively
Results If Component Fails
Fault code 27 is stored.


DTC 36 - For MPI N/A engines

Description: Air switching solenoid circuit is open or shorted
Power loss light: Off
Limp-in mode: None

Possible Causes
Bad connection or wiring - Check the wiring and connections between the logic module and the solenoid. Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

Bad solenoid - The solenoid is located in the right, front fender next to one to three other solenoids. See the Understanding Solenoids page for information about how to test and repair solenoids.

Diagnostic Method
Trigger Parameters
- Near 0V or near 12V not detected when the solenoid is turned on or off, respectively
Results If Component Fails
Fault code 36 is stored.


DTC 51 - Oxygen sensor output indicates lean too long
Power loss light: Off
Limp-in mode: Engine allowed to run rich, but prevented from running lean

Possible Causes
Bad oxygen sensor - Replace the sensor which is located on the turbo housing near the down pipe (for turbo) or on the down pipe near the exhaust manifold.

Bad connection or wiring - Check the wiring and connections between the sensor and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease and repair any shorts. Look for melted wire insulation near the exhaust manifold. A shorted connection to ground or any positive source will cause this fault code.

Low fuel rail pressure - See the Diagnosing Your Fuel System page.

Diagnostic Method
Trigger Parameters
- In closed-loop
- Sensor output indicates lean for more than 715 seconds (11 minutes, 55 seconds)
Results If Component Fails
A fault code 51 is stored, the circuit stays in closed-loop, and the logic module will still monitor the oxygen sensor signal. If the condition persists for four times what it took to set the code, the logic module will allow the engine to run rich, but prevent it from running lean.

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Dec 21, 2011 | Jeep Grand Cherokee Cars & Trucks

1 Answer

95 intrepid with a rpm problem and my codes flashed 1 1 2 3 3 2 5 5 5


You have four fault code there...

Code 11
Description: Engine not cranked since last reset or no ignition reference signal detected during cranking
Power loss light: Off
Limp-in mode: None

Possible Causes:
Engine hasn't been cranked since last reset - Power was removed from the logic module (disconnected or dead battery, etc.) and the logic module has no memory of seeing a signal from the ignition reference sensor. Crank the engine and check for the code again. If the logic module saw a signal, the code will be cleared. This code will not show up if the sensor simply fails. The logic module must be reset and the engine cranked to see if the sensor is working.

Bad connection or wiring - Check the wiring and connections between the hall effect sensor (located underneath the distributer cap) and the logic module. Check the continuity of the two 3 conductor cables coming out of the sensor--these are prone to fatiguing and breaking inside the insulation where they exit the sensor if the cables are not properly tied down. You may be able to resolder them. Clean and regrease any corroded connectors with dielectric grease and repair any shorts. This code will not show up if the sensor simply fails. The logic module must be reset and the engine cranked to see if the sensor is working (see above).

Hall effect sensor failure- Check the ignition reference sensor and fuel injector sync sensor cables. They are the two, flat 3 conductor cables coming out of the sensor at the base of the distributer cap. These often fatigue where they exit from the sensor. Upon replacing the sensor, make sure the cables are clipped or tied to the distributor cap shroud (or elsewhere) so they do not swing around. This code will not show up if the sensor simply fails. The logic module must be reset and the engine cranked to see if the sensor is working (see above).


Code 23
Notes: For throttle body injected (N/A) models only

Description: Throttle body temperature sensor signal out of range
Power loss light: On
Limp-in mode: Throttle body temperature of 70^F is assumed

Possible Causes
Throttle body temperature sensor failure - The sensor should measure 9,120 ohms to 10,880 ohms at 77^F. This sensor is located on the side of the throttle body, below the throttle plate.

Bad connection or wiring - Check the wiring and connections between the sensor and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease.

Diagnostic Method
Trigger Parameters
- Sensor output less than 0.06V or greater than 4.98V
Results If Component Fails
Fault code 23 is stored, the power loss light is turned on, and the logic module will enter limp-in mode, assuming a throttle body temperature of 70^F.

Code 32
Description: Logic module did not see a change in air/fuel ratio when EGR circuit was activated
Power loss light: Off
Limp-in mode: None

Possible Causes
EGR valve stuck open or closed - If the vehicle fails emmisions, then the valve may be shut. If the enigne runs poorly at low rpm or at idle, the valve may be stuck open. It may be the valve or the transducer valve. Test the transducer valve vacuum output. At idle, the transducer valve vacuum should be mostly bled, and there should be very little, if any vacuum at the output. When the engine is revved, the vacuum should increase. If the transducer is functioning properly, replace the EGR valve.

Bad EGR solenoid or Canister purge/EGR solenoid - The solenoid is located in the right, front fender next to one to three other solenoids. See the Understanding Solenoids page for information about how to test and repair solenoids.

Bad connection or wiring - Check the wiring and connections between the solenoid and the logic module (or SMEC). Clean and regrease any corroded connectors with dielectric grease and repair any shorts.

Diagnostic Method
Trigger Parameters
- The EGR solenoid was deactivated, but the oxygen sensor reading did not change
Results If Component Fails
Fault code 32 is stored.

Code 55
Description: End of message
Power loss light: Off
Limp-in mode: None

Possible Causes
No further fault codes are stored. If this is the only code received, then there are no codes stored in memory. This code will always be given, even if nothing is wrong. If you do not get this code, then you may not be retreiving the codes properly, or the power loss light may be burnt out. The light should come on for 1 second when the ignition is initally turned on as a bulb test.

Diagnostic Method
Trigger Parameters
- No further codes in memory


Hope this helps (remember to rate this answer).

Apr 15, 2011 | 1995 Dodge Intrepid

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