Question about 2004 Renault 181

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Renault Laguna 1.8 mono point injection will not start, fault code 23 no RPM signal. Tested crank angle sensor and wiring all OK.Fault will not clear.

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Posted on Jan 02, 2017

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SOURCE: injection fault

car wouldnt start injection fault coming up on dash renault megan 1.9 diesel 2003

Posted on Nov 26, 2008

  • 1 Answer

SOURCE: Injection fault, Renault megane 1.4

I had same Problem with 03 Megane about 6 weeks ago
and the fault on mine was the one of the Coils had gone.
got replaced £270.00 later working fine....

just happened again with same message Check Injection.
RAC told me injection has gone, so now yet again back in the garage.. How i wish i never brought a Megane

Posted on Nov 18, 2009

  • 1 Answer

SOURCE: 1.5 diesel megane injection fault

were is crankshaft sensor

Posted on Dec 07, 2009

  • 22246 Answers

SOURCE: renault scenic 1.5 dci will not start. dashboard

sorry my pet hate hate ,renault electrics ,this is a dealer only job because the vehicle uses advanced encrypted software that not even the dealer has ,its connected via the internet to the factory direct .So pay your money and take your chances

Posted on Jan 17, 2010

  • 5 Answers

SOURCE: i have a fault code P0170 fuel trim problem on my

fuel pressure regulator

Posted on Apr 09, 2010

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I have a renault laguna 1.8 y reg. the car drives fine till a warning light comes up saying there is a problem with the fuel injection system, the accelarator wont work but the car will still drive just...

the ECM is going into limp mode because a sensor is reporting a dangerous situation for either the engine or transmission
Have the fault codes read as this will determine the location of the fault instead of guessing.

Jan 08, 2015 | Renault Cars & Trucks

1 Answer

Truck will be running fine, then all of a sudden it will completely shut off. After we wait a few minutes and pump the clutch and make sure it is all the way to the floor it will start, sometimes. S

You need the engine computer scanned for fault codes, i thank you have an ignition control problem like a module or distributor pickup coil issue. These parts whenthey fail should leave fault cdes so get them read.
Next, the check engine light will pause shortly followed by the second digit of the trouble code. For example if the check engine light blinks once and pauses followed by six blinks the trouble code number would be 16. If no code is present the check engine light will stay one constantly. To restart code gathering turn the ignition key to the "off" position, wait three minutes and turn the ignition key back "on" again without starting the engine. Remove the jumper wire once code gathering is complete. To clear code after the repairs have been made remove the negative battery cable for one minute and reconnect.
Toyota Diagnostic Connector
Toyota Code Definition Table
Code 11 Momentary interruption in power supply to ECU (electronic control unit or computer) up to 1991
Code 12 Engine revolution signal missing Code 13 Rpm signal to ecu missing above 1000 rpm
Code 14 Igniter signal to ecu missing
Code 16 A/T control signal missing from ecu
Code 21 Main oxygen sensor signal fault
Code 22 Water temperature sensor circuit fault
Code 23 and 24 Intake air temperature signal fault
Code 25 Air/fuel ratio LEAN
Code 26 Air/fuel ratio RICH
Code 27 Sub-oxygen sensor signal or heater circuit fault
Code 28 No. 2 oxygen sensor/heater signal fault
Code 31 and 32 Air flow meter circuit or Vacuum sensor signal fault Code 34 and 36 Turbo-charging pressure signal fault
Code 35 Altitude compensation sensor signal fault
Code 41 Throttle position circuit fault
Code 42 Vehicle speed sensor circuit
Code 43 No starter signal to the ecu
Code 51 AC signal on; DL contact off (in transmission shifter with diagnostic connector jumped)
Code 52, 53 and 55 Knock sensor fault Code 71 EGR system malfunction
Code 72 Fuel cut solenoid signal fault
Code 78 Fuel pump control signal fault
Code 81, 83, 84 and 85 TCM communication fault

Jun 28, 2012 | Cars & Trucks

1 Answer

Ten codes which should I start with ? P0506. P0507.p0410. P0106. P0107. P0306. P0335.P0385. So I'm thinking I have bad sensors and more the one vacuum hose crack of disconnect. I just got this car...

Start with looking at scan data on a scan tool , not a code reader
If the PCM detects a MAP sensor signal voltage that is excessively low, DTC P0107 will set.
The PCM calculates a predicted value for the MAP sensor based on throttle position and engine speed. The PCM then compares the predicted value to the actual MAP sensor signal. DTC P0106 will set if the MAP sensor signal is not within the predicted range.
This does not mean the sensor is bad ,could be a wiring problem ,computer etc....
P0306 is a misfire on cylinder # 6 This would be a good one to start with , could ruin the CAT .
The powertrain control module (PCM) uses dual crankshaft position (CKP A and CKP B) sensors in order to determine crankshaft position.
If the PCM determines that CKP sensor A is at fault, DTC P0335 will set. The PCM will switch from angle based mode to Time Based mode B using CKP sensor B signal input.
Diagnostic Aids
If the condition is intermittent, refer to Intermittent Conditions in Symptoms.
Ignition system DTCs set with the ignition in the START position if the starter relay or the starter is inoperative. When the PCM enables starter operation, the PCM also initiates the diagnostic test routines for DTCs P0335, P0340, and P0385. The PCM will not receive signal input from the CKP and CMP sensors if a condition exists which prevents the engine from cranking. When this occurs, the DTCs will set.
If DTC P0615 is set, diagnose DTC P0615 first. If DTC P0335, P0340, and/or P0385 are set and no trouble is found, check for the following conditions:
• Is there a no-crank condition or an intermittent no-crank condition?
• Was an attempt made to crank the engine with the shift lever not in P/N?
Procedures for Selecting Crank Position Sensing Decode Mode
Diagnosing the crankshaft position sensors may require enabling a specific decode mode (Angle, Time A, or Time B). To enable a specific crank decode, using the scan tool, perform the following steps:
• Turn the ignition to the RUN/ON position.
• Select Engine Output Controls.
• Select Crank Position Sensing Decode Mode.
• Select the desired mode (Angle, Time A, or Time B) by pressing SELECT STATE.
• Command the decode mode by pressing COMMAND STATE.
The commanded state remains valid for the current ignition cycle. A specific decode mode can not be commanded with the engine running, or after commanding a desired decode mode. To command a different decode mode, you must cycle the ignition OFF and ON.

DTC P0385
The PCM uses two basic methods of decoding the engine position: Angle Based and Time Based (using either CKP A or CKP B sensor input). During normal operation, the PCM uses the angle based method. In order to operate in this mode, the PCM must receive signal pulses from both CKP sensors. The PCM uses the signal pulses to determine an initial crankshaft position, and to generate MEDRES (24X reference) and LORES (4X reference) signals. Once the initial crank position is determined, the PCM continuously monitors both sensors for valid signal inputs. As long as both signal inputs remain, the PCM will continue to use the angle based mode.
When either CKP signal is lost, the PCM will compare the MEDRES signal to the camshaft position (CMP) sensor signal. If the PCM detects a valid CMP signal, and the MEDRES to CMP signal correlation is correct, the PCM determines that CKP sensor A is at fault. However, if the MEDRES to CMP correlation is incorrect, the PCM determines that CKP sensor B is at fault. If the PCM determines that CKP sensor B is at fault, DTC P0385 will set. The PCM will switch from angle based mode to Time Based Mode A using CKP sensor A signal input.

DTC P0410
Circuit Description
The secondary air injection (AIR) pump used on this vehicle lower tail pipe emissions during start-up. The AIR system consists of the following items:
• The AIR pump
• The shut-off valves
• The vacuum control solenoid valve
• The system hoses and piping
• The AIR relay, the fuses, and the related wiring
The powertrain control module (PCM) uses the AIR relay in order to control the AIR pump. The PCM also controls the AIR vacuum control solenoid valve that supplies vacuum to the AIR shut-off valves. With the AIR system inactive, the AIR shut-off valves prevent air flow in either direction. With the AIR system active, the PCM applies ground to the AIR relay, and the vacuum control solenoid valve. Fresh air flows from the pump, through the system hoses, past the shut-off valves, and into the exhaust stream. The air helps the catalyst quickly reach normal working temperature; thus lowering the tail pipe emissions on a start-up. The PCM tests the AIR system for the following conditions:
• AIR System (Overall system including both banks, and results in DTC P0410)
• AIR System Bank 1 (DTC P1415)
• AIR System Bank 2 (DTC P1416)
• AIR Relay (DTC P0418)
• AIR Vacuum Control Solenoid (DTC P0412)
The PCM runs two tests to diagnose the AIR system: Passive, and Active. Both tests involve a response from the fuel control HO2 sensors (HO2S Bank 1 Sensor 1 and HO2S Bank 2 Sensor 2). If both passive tests pass, the PCM takes no further action. If either part of the passive test fails, or is inconclusive, the PCM initiates the Active tests. If the PCM determines that the HO2S voltages did not respond as expected during the tests, the DTC will set. For further information concerning the AIR System and system tests, refer to

DTC P0506 DTC P0507
The idle air control (IAC) valve is located in the throttle body. The IAC valve consists of a movable pintle, driven by a gear attached to an electric motor called a stepper motor. The IAC valve motor is a 2-phase bi-polar permanent magnet stepper motor that is capable of highly accurate rotation, or movement, every time the polarity of a winding is changed. This change in polarity can be seen when observing a test lamp connected between ground or B+ and an IAC valve circuit while the powertrain control module (PCM) is attempting to change engine RPM. The test lamp will flash on or off each time the polarity is changed. The PCM does not use a physical sensor to determine IAC pintle position, but uses a predicted number of counts, one count represents one change in polarity which equals one step of the stepper motor. The PCM counts the steps that have been commanded in order to determine the IAC pintle position. The PCM uses the IAC valve to control engine idle speed by changing the pintle position in the idle air passage of the throttle body. This varies the air flow around the throttle plate when the throttle is closed. In order to determine the desired position of the IAC pintle at idle or during deceleration, the PCM refers to the following inputs:

Important: Ensure that the engine speed stabilizes with each commanded RPM change in order to determine if engine speed stays within 100 RPM of the commanded RPM.
Set the parking brake, and block the drive wheels.
Install a scan tool.
Start the engine.
Turn OFF all the accessories.
With the scan tool RPM control function, slowly increment engine speed to 1,700 RPM, then to 600 RPM, then to 1,800 RPM.
Exit the RPM control function.
Does the engine speed stabilize within 100 RPM of the commanded RPM during the above test?

011 Idle Speed Problems Scan Data For Idle Control

016 Engine Misfire Crank and Cam Signals

Jun 15, 2017 | 2001 Cadillac DeVille

3 Answers

Renault laguna 1.9 dci injection fault on dash but car performs fine

probally be a good idea to have a local shop run a fuel system check to eliminate alot of wasted time or money. its well worth the time to have it properly checked by a trained mechanic. alot of engine problems the computer picks up wont be noticed at first and can lead to expensive repairs

Jan 24, 2012 | Renault Laguna Cars & Trucks

1 Answer

Not starting first time

I'm guessing by your brief description that it doesnt start first time but does after a couple of attempts? If so, i would start by looking at the tdc sensor located on the nearside of the engine bay, bolted ontop of the gearbox. This picks up a signal from the flywheel as it rotates on cranking which in turn sends a signal to injector computer. This is used to determine the position of the engine to ensure correct timing of fueling and firing. Sometimes a wiggle of the wire will determine the fault is definitely with the sensor and renault repair is for a new sensor and a modified loom.

If wiggling the wire doesnt work it could be a more serious fault i.e the injection computer is receiving a signal from the tdc sensor but in turn isnt outputting a signal to the fuel/ignition system or just a broken wire.

But hopefully a wiggle of the wire will determine the cheaper option

Hope this helps

Jan 10, 2011 | 2003 Renault 181

1 Answer

I need a honda car code , i can't turn on my radio

service manual.
Code Description Possible Cause
0 ECU / ECU signal No signal to ECU
1 Oxygen sensor circuit Oxygen sensor or circuit, ECU
2 Oxygen sensor circuit Oxygen sensor or circuit, ECU
3 MAP sensor circuit Map sensor circuit
4 CKP sensor / engine speed (RPM) Crank angle sensor or circuit, ECU
5 MAP sensor circuit MAP sensor or circuit, mechanical
6 ECT sensor circuit ECT sensor or circuit, automatic
transaxle control unit
7 TPS / Angle Sensor TPS sensor or circuit, automatic
transaxle control unit
8 CKP sensor / engine speed (RPM) Crank angle sensor or circuit, ECU
9 CMP sensor CMP sensor or circuit
10 IAT sensor IAT sensor or circuit
11 Idle Mixture Adjuster Sensor Idle mixture adjuster sensor or
12 EGR system fault No EGR action, faulty EGR valve
13 BARO sensor circuit BARO sensor or circuit
14 Idle Air Control valve circuit / ECU Open or shorted out ignition signal
circuit / No signal to ECU
15 Ignition Output signal Open or shorted ignition output
signal circuit
16 Fuel Injector Circuit Open or shorted fuel injector
17 VSS circuit VSS sensor or circuit
18 Ignition Timing Adjuster Open or shorted signal circuit
19 A/T Lock-up control solenoid Open or shorted signal circuit,
Lock-up control solenoid lock-up solenoid
20 Electrical Load Detector / Sensor Electrical load detector or circuit
Fault Code Definitions (21 - 59)
Chapter 3 22
Code Description Possible Cause
21 Spool Solenoid Valve Open or shorted signal circuit,
spool solenoid valve
22 Valve Timing Electronic Oil Open or shorted signal circuit,
pressure switch valve timing oil pressure switch
23 Knock sensor circuit Knock sensor or circuit
30 AT / ECU communication signal A AT control unit, ECU
31 AT / ECU communication signal B AT control unit, ECU
35 Traction control / ECU / signal Traction control module, ECU
36 Traction control / ECU / signal Traction control module, ECU
41 Oxygen sensor heater - left side Oxygen sensor / heater or circuit
42 Oxygen sensor heater - right side Oxygen sensor / heater or circuit
43 Fuel Supply system - left side Oxygen sensor or circuit, fuel
44 Fuel Supply system - right side Oxygen sensor or circuit, fuel
45 Fuel metering - left side Injector control circuit, incorrect
fuel metering
46 Fuel metering - right side Injector control circuit, incorrect
fuel metering
48 Heated oxygen sensor Oxygen sensor or circuit
53 Right Knock Sensor Right knock sensor or circuit
54 CKP sensor 2 CKP sensor 2 or circuit
59 CMP sensor 2 CMP sensor 2 or circuit

Dec 28, 2010 | 1994 Honda Accord

1 Answer

Is there an ALDL port on a legend plug in a scan tool

There is a connector but it is not like the connector used in the newer 1996 OBD2 cars, your year uses OBD1, here is how you check for codes in this car.

Acura OBD1 Codes Retrieval
Acura vehicles 1986-95 obd1 code retrieval
There are a few different ways to retrieve the codes for "check engine light" for Acura vehicles. One method is to use a led light (sometimes 2 led lights) on the computer or controller box itself. If it has 2 led lights, the color is red and amber. The red is used for flashing the codes whereas the amber is used for adjustment. If you have only a single led light indicator, then that is used for flashing the code.
The controller box can be found by lifting the carpet of the passenger side front foot well or floorboard. You can see the led lights without removing the controller. On other models, you can find the controller under the driver or passenger front seat.
The second way to get the code is using a jumper wire on the diagnostic connector located on the kick panel at the front passenger side. You then watch the codes being flashed at the dash panel after you turn the key on. To read the code being flashed is easy. Example: Code 23 is 2 long flashes followed by 3 short flashes. A longer pause separates the next code that follows.
Here are Acura vehicles 1986-95 general codes:
Code 0 Electronic control unit (ecu)
Code 1 02 (oxygen) sensor
Code 3 and 5 map sensor
Code 4 Crank angle sensor
Code 6 Coolant temperature sensor
Code 7 Throttle angle sensor
Code 8 Crank angle sensor (TDC)
Code 9 Crank angle sensor (CLY)
Code 10 Intake air temperature sensor
Code 12 EGR system fault
Code 13 Atmospheric pressure sensor
Code 14 Electronic air control valve
Code 15 Ignition output signal
Code 16 Fuel injector fault
Code 17 Vehicle speed sensor
Code 21 Spool solenoid valve
Code 22 Valve timing oil pressure switch fault
Code 23 Knock sensor
Code 41 Oxygen sensor heater fault
Code 43 Fuel supply system

Nov 30, 2010 | 1990 Acura Legend

3 Answers

I need to know what the code 18 and 41 means for 93 Buick Park Avenue Ultra with a 3.8 litre supercharged eng

When fixing codes start with first code first / it dos not always mean that the sensor is the fault ,it could be in the harness / the plug or the ground. and reference signal should be tested , but in this case you most likely could get away with replacing the cam sensor, that would be the Lest expensive and easiest to start with,to git to it you will have to remove the alternator hope this is help full, the other code suggest that it could be the crank sensor , that and the plug for it does fail quite often but first things first feel free to ask if you should have any further questions , Thank you ,

Mar 31, 2010 | 1993 Buick Park Avenue

2 Answers

R reg Megane Scenic non start


Well, no noid signal and no spark says to me that the crank sensor is at fault.

Does the check engine light come on when you turn on the igntion? If not then the ECU is not waking up.



Jun 11, 2008 | Renault 181 Cars & Trucks

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