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Multiple conflicting codes stored in the pcm - Audi Cars & Trucks

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1999 chevy malibu p1610 diagnostic code means what?


DTC P1610 Lost Communications with Body Multiple Control (BCM) System
Circuit Description
The PCM uses the serial data circuit to communicate with various other devices and systems in the vehicle. The PCM ensures that communication remains established by monitoring the serial data circuit for state of health messages from the other devices using the circuit. If the PCM detects a loss of the state of health serial data message from the Body Function Controller (BFC), DTC P1610 will be set.

Aug 12, 2017 | Cars & Trucks

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P0627 on a ford ranger tdci canot find those modules and relays to check


n the event of fuel pump "A" control circuit fault, a trouble code will be stored and a service engine soon lamp will be illuminated. Some models require multiple drive cycles (as many as 8) with a failure in order for the service engine soon lamp to be illuminated and others will activate it on the initial failure. The "A" refers to more of an area of malfunction as opposed to a particular circuit or component.

Symptoms

Symptoms may include a stored trouble code, an illuminated fuel cap malfunction lamp, and possibly an illuminated service engine soon lamp. If this code is stored, and a service engine soon lamp has not yet been illuminated, the code may be shown as pending.

Common Causes

The most likely cause of this code being stored is a defective fuel pump or relay. Most fuel pump control circuits are integrated into the PCM. Other causes may include corroded, open, or shorted wiring or connectors in the CAN Bus harness, a loose control module ground strap or broken ground wire, the CAN bus may also be defective

Feb 29, 2016 | Ford Cars & Trucks

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I have a 2001 Pontiac grand am gauges don't work or the fog lights and the daytime lights don't work and the door locks don't lock when u put it in drive it all started when the fuel pump


As far as instrument cluster gages, The pcm receives a signal from specific sender unit. The pcm then sends serial data to instrument for that gage setting. As an example, the fuel level gage defaults to empty if the pcm detects a problem with sending unit or wiring. Also defaults to empty if ipc detects a problem with serial data circuit from pcm.

Can you check for applicable trouble codes? Some of the national brand auto stores will check codes for free.

If you want to check voltage and ground for instrument cluster, go ahead.
Usually with multiple issues, I just pick one and troubleshoot it. Fixing one, may or may not fix the others.

Nov 30, 2015 | Pontiac Cars & Trucks

1 Answer

02 escalade wont start now code p1631 on scanner how do i fix


This is the theft deterrent system --- the body control module (BCM) and power train control module (PCM) have conflicting codes. The codes between the two must match. If you've replaced one, you need to 're-learn' them so the codes match.

Nov 22, 2013 | 2002 Cadillac Escalade

1 Answer

Engine warning light , antipolution problem


The engine warning light is indicating there is a fault with one of the multiple electronic systems your car. Your car's computer (PCM/ECM) monitors continuously all functions of the engine and emission systems. You'll need to take it to a shop to have the stored fault code(s) retrieved to start a diagnosis, and it could one, or several codes.

Apr 21, 2013 | Cars & Trucks

1 Answer

Changed all spark plugs 2 coils still getting po316 and po305 what could be causing this f150 4.6 liter problem started after putting in a new fuel pump


Diagnostic Test Code (DTC) P0316 means that a cylinder misfire was detected within the first 1000 revolutions of the engine crankshaft after engine startup. This code will always be stored at the same time with freeze frame data and a fault code for the offending cylinder.
This is where DTC P0305 comes in.
This code means that cylinder #5 is the cylinder that is causing the misfire.
Coils and plugs are only two of the many possible reasons for a cylinder misfire.
The possible reasons for both of these codes are:
> Damaged crankshaft position sensor
> Ignition system (Primary or Secondary)
> Faulty fuel injector or fuel injector control circuit
> Poor fuel quality (will usually cause MULTIPLE cylinder misfire codes)
> Base engine faults (burned valves, low compression, damaged lifters or cam, blown head gasket, etc.)
> Damaged/malfunctioning PCM

NOTE: The LEAST LIKELY cause is the PCM. A damaged Crankshaft Position Sensor will usually cause problems on ALL cylinders, not a single cylinder, however it IS possible if the sensing ring is damaged.

Aug 09, 2011 | 2003 Lincoln LS

1 Answer

2005 dodge grand caravan...engine light on and off, went to autozone diagnostic. replaced upstream 02, last year replaced downstream...engine light came back on. need help!


When "check engine" litgh tun on, the PCM (computer) is warning that some fault code is stored there. Autozone could scanned your PCM and show exactly what fault codes is there; if your O2 sensors was replaced, I assuming that they can see this codes... so, they reset and delete all codes stored there? Scanned the PCM after this change?

Keep us updated-

Jun 03, 2011 | 2005 Dodge Caravan

1 Answer

Check engine light appears after 30 minutes of


ON-BOARD DIAGNOSTICS Dodge OBD1 Pre 96

1. Cycle the ignition key ON-OFF-ON-OFF-ON within 5 seconds. To cycle the ignition key ON means to turn it only as far as it takes to get the radio to come on. It does not mean to turn the engine on.

2. Count the number of times the "check engine" lamp on the instrument panel flashes on and off. The number of flashes represents the code. There is a slight pause between the flashes representing the first and second digits of the code. Longer pauses separate individual codes. For example, flash-flash-flash [pause] flash-flash represents the code 32.

A code of "55" represents end of error codes. If this is all you get then no error codes are stored in the computer. This is the normal condition

CODE Description of Trouble Code
11 Timing belt skipped 1 tooth or more from initial learned value, Intermittent loss of either camshaft or crankshaft position sensor, No crank reference signal detected during engine cranking
12 Direct battery input to PCM was disconnected within the last 50 key-on cycles (normal)
13 No change in MAP from start to run
14 MAP sensor voltage too low
15 No vehicle speed sensor signal
17 Closed loop temp not reached or engine cold too long
21 02s sensor problem (oxygen sensor), upstream or down stream
22 Engine coolant temp sensor out of range
23 Intake air temp sensor out of range
24 Throttle Position sensor out of range
25 Idle air control motor circuits, target idle not reached (+/- 200),vacuum leak found
27 Injector control circuit
31 Evap purge flow monitor failure or evap solenoid circuit
32 EGR system failure
33 A/C clutch relay circuit
34 Speed control Solenoid circuits
35 Rad Fan control relay circuit
37 Torque converter clutch solenoid CKT or park/neutral switch failure
41 Generator field not switching properly
42 Fuel pump relay control ckt, Auto shutdown relay control ckt, No ASD relay output voltage at PCM, Fuel level sending unit volts out of range, Fuel level unit No change over miles
43 Multiple/ single cylinder misfire
44 Battery temp sensor volts out of range
46 Charging system voltage too low
51 Fuel system lean
52 Fuel system rich
53 Internal control failure
54 No Cam signal at PCM
55 End of error messages (If you get this only, no errors were found)
62 PCM failure SRI mile not stored
63 PCM Failure EEPROM write denied
64 Catalytic Converter Efficiency Failure
65 Power steering switch failure

Jul 21, 2010 | 1995 Chrysler Concorde

1 Answer

Wont run smooth &misfires has code po 352 ignition coil #2 primary circut


First you should have a Haynes Manual for your specific car that's available at most parts stores. Since it states that your "Ignition Coil B primary or secondary circuit malfunction", then I would first measure the Coils Resistance which is listed in your Haynes Manual. If it comes up incorrectly for the values given, then replace the coil, if not, check the Z2 Circuit which is the Ground to your PCM or computer. It should be a 12 gauge wire, black & tan that's bolted to the Engine block for a corroded condition. This corrosion will throw multiple codes except for the PCM's Ground. In the Haynes Manual there is a wiring diagram of your PCM in the back that, if I'm wrong about the color of the wire, will give you the proper color.

"00 Buck"

Jul 17, 2010 | 1998 Dodge Intrepid

1 Answer

Engine light is on...


P0137--O2 Sensor Circuit Low Voltage-Bank 1 Sensor 2

P0139--O2 Sensor Circuit Slow Response-Bank 1 Sensor 2

P0152--O2 Sensor Circuit High Voltage-Bank 2 Sensor 1

P0300--Random Multiple Cylinder Misfire


I would suspect that the camshaft position sensor is bad. This is a quote from the tech manual:

The Powertrain Control Module (PCM) uses the camshaft position sensor to manage sequential fuel injection and as part of misfire diagnosis. The PCM constantly monitors the number of pulses on the signal circuit. The PCM compares the number of camshaft sensor reference pulses and the number of crankshaft position sensor reference pulses received. If the PCM receives an incorrect number of pulses, Diagnostic Trouble Codes (DTCs) should be stored in the PCM. Some PCM systems will then default to multi-port or "gang-fire" injector operation. The camshaft position sensor signal is required to sequence the injector operation to the proper cylinder timing. If the camshaft position sensor or circuit is faulty, most engines will start. However, the PCM misfire diagnostic will likely be affected.

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The part costs $50.....simple to change. It is NOT the O2 sensors so don't go wasting money on those. They are being affected due to related symptoms....they fault because the problem is happening upstream.

Oct 01, 2009 | 2002 Dodge Intrepid

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