Nov 042018

2010 Mercedes-Benz E350

I did a scan for codes with an OBDII Scantool for Mercedes only N code came up a10d00 saying power supply too low(stored) N. The next one read 9a4f13 right KEYLESS GO has a malfunction. THERE IS N OPEN CIRCUIT. CURRENT N STORED HOW DO I FIX IT

Did not find any reference to the second code you mentioned. However, there is a Technical Service Bulletin out related to this code A10D00. It refers a wiring harness being damaged in the area of the roof frame.  This could affect one or all of the following areas:

  • Overhead control panel nonfunctional
  • Bluetooth nonfunctional
  • Multi-function camera nonfunctional or , malfunctions

TSB Reference Number: LI54.18-P-048131, Date of Issue: November 20, 2009 – The entire TSB along with step by step corrective procedures and pictures are included in each manual. – Purchase Manual

Fault Code A10D00

Mercedes-Benz Code A10D00 Description – The power supply is too low.

Control Unit: MFK – Multi-function camera (A40/11)(MPC212)


Nov 042018

Dodge Grand Caravan

2003 Dodge Grand Caravan won’t turn over. New battery, new starter. All fuses and cables are good, ignition switch is good, the engine is not locked up. A few weeks ago the van would start fine then randomly shutoff going down the road. Then it could take between 2 minutes and 2 days to restart. It hasn’t started in a month now. What else could be the problem?

Sounds like a loose ground connection. But instead of jumping to that conclusion we have developed a step by step diagnostic chart just for this occasion.

Oct 252018

Nissan Titan

Have code 1273…Air fuel sensor…Where is it located and how to change?

Nissan Code P1273

Code P1273 Description:

Air Fuel Sensor 1 Heater Bank 1

Code P1273 Probable Causes:

  1. Sensor or solenoid faulty
  2. Connector terminal contact is damaged or corroded
  3. Wire harness – Check harness for correct voltage, open, short to ground or short to voltage
  4. Update control unit software – Check for the latest control unit update
  5. Powertrain or Engine Control Module faulty
  6. HO2S sensor contamination/damaged

Air Fuel Sensor Location

  • Sensor 1 Bank 1 – at left rear of engine (F65)
  • Sensor 1 Bank 2 – at right rear of engine compartment (F5)

Air Fuel Sensor Location Diagram

A closer look under the hood gives you a better view of the exact location of the A/F sensor.

A/F sensor location diagram

How to change Air Fuel Sensor

  1. Remove harness connector of air fuel ratio A/F sensor
  2. Remove the air fuel ratio A/F sensor is a 7/8 (22 mm) offset oxygen sensor socket.( the socket has a slot in one side to allow siding over the wiring harness.

Offset Oxygen Sensor Socket

  • Size: Common 6 point, 7/8 inch (22 millimeter) hex fits almost all oxygen sensors; 3/8″ drive for ratchets.
  • Design: This socket’s slotted design allows you to remove oxygen sensors with the wiring harness still attached, and the unique off set design of the T7822F Oxygen Sensor Wrench delivers maximum torque with maximum convenience! Made to increase torque on hard-to-remove O2 sensors and allows you to access tough spots, easily!

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> > Need more, access a 2004 Nissan auto repair manual now!

Oct 252018

2005 GMC Yukon

Instrument Cluster, Radio, Door Locks, and Windows quit working on my 2003 GMC Yukon XL SLT 4×4. Believe it to be in the BCM. Need schematics, Connector Charts, and Diagnostic connector Diagram to Help in Diagnosing. Thanks, Patches

Here is the information that I have including wiring diagrams. A blown fuse that is used by all systems described would be the first thing I would look for. And it would be the most common cause if they all went out at the same time. Since the vehicle is more than 10 years old, rusted ground connections may also be a factor.

Body Control System Description and Operation

BCM Functions

The Body Control Module (BCM) performs multiple body control functions. The BCM can control devices directly connected to its outputs based on input information. The BCM evaluates this information and controls certain body control systems by commanding outputs on or off. The BCM control inputs can be:

  • Sensors and switches that are directly connected to the BCM
  • Class 2 serial data received from other control modules connected to the class 2 serial data link.

The BCM is also capable of controlling other vehicle systems that are not directly wired to the BCM. The BCM does this by sending specific messages on the class 2 serial data link. The control module capable of performing the required function will respond to the BCM message.

The BCM controls these functions:

  • Audible warnings
  • Automatic door locks
  • Automatic headlamp control
  • Interior lighting
  • Keyless entry (AUO option)
  • Passlock theft deterrent
  • Retained Accessory Power (RAP)

Serial Data Power Mode

On vehicles that have several control modules connected by serial data circuits, one module is the power mode master (PMM). On this vehicle the PMM is the Body Control Module (BCM). The BCM uses 3 signals from the ignition switch. These are the Ignition 0, Ignition 1, and Accessory.

To determine the correct power mode the BCM uses:

  • The state of these signals
  • Next , the sequence of switch closures received by the BCM
  • Finally, the status of the engine run flag

The chart indicates the power modes detected and transmitted by the BCM:

Correct Ignition Switch Inputs

Ignition Key Position

Power Mode Parameter

Engine Running

Sampled Ignition Signal State


Ignition 1

Ignition 0

OFF Off-Awake or RAP No Inactive Off Off
UNLOCK Unlock or RAP Unlock No Inactive Off On
ACC Accessory No Active Off On
ON Run No Active On On
START Crank No Inactive On On
ON Run Yes Active On On

Fail-safe Operation

Since the operation of the vehicle systems depends on the power mode, there is a fail-safe plan in place should the BCM fail to send a power mode message. The fail-safe plan covers modules with discrete ignition signal inputs as well as those modules using exclusively serial data control of power mode.

Serial Data MessagesThe modules that depend exclusively on serial data messages for power modes stay in the state dictated by the last valid BCM message until they receive the engine status from the PCM. If the BCM fails, the modules monitor the serial data circuit for the engine run flag serial data. If the engine run flag serial data is true, indicating that the engine is running, the modules fail-safe to “Run”. In this state the modules and their subsystems can support all operator requirements. If the engine run flag serial data is false, indicating that the engine is not running, the modules fail-safe to “OFF-AWAKE”. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.

Discrete Ignition SignalsThose modules that have discrete ignition signal inputs also remain in the state dictated by the last valid BCM message received on the serial data circuits. They then check the state of their discrete ignition input to determine the current valid state. If the discrete ignition input is active, B+, the modules will fail-safe to the “RUN” power mode. If the discrete ignition input is not active, open or 0 voltage, the modules will fail-safe to “OFF-AWAKE”. In this state the modules are constantly checking for a change status message on the serial data circuits and can respond to both local inputs and serial data inputs from other modules on the vehicle.

Body Control Module Programming


The procedures below are designed to set-up the body control module (BCM) correctly during BCM related service. Before you start, read these procedures carefully and completely.


The following procedures must be followed:

  1. BCM Programming
  2. Programming Theft Deterrent System Components, if equipped with Passlock System.

Programming the BCM


After the procedure is completed, the personalization settings of the BCM are set to a default setting. Inform the customer that the personalization must be set again.

Programming Theft Deterrent System Components


This procedure has to be performed only for vehicles equipped with Passlock System.

Perform the Programming Theft Deterrent System Components in Theft Deterrent after successfully finishing the Setup New BCM procedure. If the Programming Theft Deterrent System Components in the Theft Deterrent procedure is not performed after a BCM replacement, one of the following conditions will occur:

  • The vehicle will not be protected against theft by the PASSLOCK system.
  • The engine will not crank nor start.


After programming, perform the following to avoid future misdiagnosis:

  1. Turn the ignition OFF for 10 seconds.
  2. Connect the scan tool to the data link connector.
  3. Turn the ignition ON with the engine OFF.
  4. Use the scan tool in order to retrieve history DTCs from all modules.
  5. Clear all history DTCs.

> > Need more, access a 2003 GMC auto repair manual now!

Oct 142018

2010 Chavy Impala

My automatic headlight won’t shut off.

This is common of a sticking relay. You will want to look for the DRL Relay. DRL = Daytime Running Lights.

DRL Relay Location

The DRL Relay is located in the underhood fuse block on the right side of the engine compartment. Look under the lid of the fuse block for exact location diagram.

Daytime Running Lamps (DRL)/Automatic Headlamp System

Daytime Running Lamps (DRL) can make it easier for others to see the front of your vehicle during the day. Fully functional daytime running lamps are required on all vehicles first sold in Canada.

The DRL system makes the low-beam headlamps come on at a reduced brightness when the following conditions are met:

  • The ignition is in the ON/RUN position.
  • The exterior lamps control is in AUTO.
  • The engine is running.

When the DRL are on, the regular headlamps, taillamps, sidemarker, and other lamps will not be on. The instrument panel and cluster will also not be lit.

The headlamps automatically change from DRL to the regular headlamps depending on the darkness of the surroundings. The other lamps that come on with the headlamps will also come on.

When it is bright enough outside, the headlamps will go off and the DRL will come on.

The regular headlamp system should be turned on when needed.

Do not cover the light sensor on top of the instrument panel because it operates the DRL.

Oct 112018

Save at the Pump

These days with the Economy driving Prices up the consumer needs to watch every penny. In Some households we are seeing the amount of money being spent on gas becoming greater than the house payment.

Luckily for us the fuel retailers are offering incentives to those who frequent there fueling stations. For example, you can pick up a speedy rewards card form Speedway or a U-Drive Card from United Dairy Farmers. How it saves you money is up to you. If you add a carwash at UDF, they will instantly knock off $.10 per gallon of gas. Buy 2 gallon of milk and they add the discount. But some ice cream get a discount added. All your discounts can be accumulated and used at your next purchase at the pump.

So just for buying the things you already buy anyway, they are saying thank you at the gas pump. Its nice to be able to save some money anyway you can and when you already are buying gas, why not save some there too. So take advantage of these offers and you will save money at the pump.

No Sign Up Fees

  • Earn every time you use the card
  • No annual fees
  • Points and discounts accumulate

Example Card Image:

gas card

Oct 112018

Jump starting a car

The time will come if it hasn’t already that you will need to jump start your car. Knowing the best way to jump start your car can be very useful and save you time. You Will need to make sure all the battery connections are clean so your jumper cables can make a good connection. You can use a wire brush or the if you have some hot coffee or tea handy, pour it on. This will eliminate the majority if any corrosion around the area. Now your ready to attach the jumper cables and in a specific order.

  1. Attach one red cable to the positive of the dead battery
  2. Connect the other end of that same cable to the positive of the good battery
  3. Attach one black cable to the negative of the good battery
  4. Connect the other end of the black cable to a good ground in the engine compartment of the dead battery. Clip it to a strut tower bolt, frame or alternator bracket.

jump start a car

Things you might need when jump starting a car

  • Eye protection
  • Rubber gloves
  • A hand towel or rag
  • Wire brush
  • Hot water or coffee
  • Jumper cables
Oct 112018

Buying Used Car

Thinking about buying a used car? Here are 10 things you might want to know before making your purchase..

  1. What year is the vehicle
  2. Does it have a clear title, no leans on it
  3. Does it have a salvage title
  4. Is there a check engine light on
  5. Are there any leaks
  6. Is there anything that doesn’t work
  7. How does it run, stop and steer
  8. What condition are the tires in
  9. Does the air conditioning work
  10. Do the windshield wipers work

These are a few things that can cost you a significant amount of money if they are in need of repair. Not all these items will keep the car from going down the road today, but how much do you want to spend in the future. Better yet, how much do you have to spend when it breaks in two weeks.

Look it over

Look it over very carefully. If you are not comfortable with it, don’t be shy about asking to have your mechanic look at the car. If the seller starts acting like he can’t have anyone but you look at it, there is probably a good reason to steer clear of this one.

Lets take our time and test drive it further than just around the block. Make sure you get the engine up to operating temperature. Check the windows go up and down ( average price of a window regulator replacement is around $250). Check the brakes for pulsation when stopping. Make sure the car isn’t pulling to one side or the other. Roll the windows down and listen for any mysterious noises. Make certain you know what you are about to spend your hard earned money on.

We all know its hard not to jump at the chance to have that bright red Mustang that you came across that is much cheaper than you expected, but odds are… there is a reason it is so cheap. So find out what it is and then decide if you can live with it or afford to fix the issue. You should be able to enjoy buying a used car once you know what to look for.

Oct 112018

Hidden Fees

Think about the last time you had to take your car in for a repair or routine service. Did you ask for an exact amount you could write the check for when you picked up your car before you authorized the repair? Did you go in with a coupon that said $14.95 oil change, Only to be charged much more when it was time to pay? This happens more often than you think.

You go to pay and find an extra fee from “Environmental Disposal Fee”, “Shop Supplies”, “Mechanics Tax”, “Thumb Tax” to some other made up “Miscellaneous Fee” to make you feel like the shop had to charge you for this extra fees.

The next time you go in for a service and have a coupon, look at the fine print for disposal fees and extras. You might decide the shop you’ve been going to is as up front about things as you thought. Make them put in writing the total amount you will have to pay when you return to pick up your car. This should help you avoid any Hidden Fees or Charges. And who knows, might even save you a buck or two along with avoiding unnecessary grief.

Example Coupon Image:
oil change coupon

Fees or Extras to Look Out For

  • Shop Supplies
  • Environmental Disposal Fees
  • Disposal Fees
  • Miscellaneous
  • Mechanics Tax
  • Thumb Tax
Oct 102018

1999 Dodge Durango

Only starts in neutral , no backup lights! neutral / safety switch bad? thanks in advance!

That would be my first thought, being the neutral switch. Or the gear shift cable is just out of adjustment.

Transmission Park/Neutral Switch

The park/neutral switch is located on the transmission housing and provides an input to the powertrain control module (PCM) This will indicate that the automatic transmission is in Park, Neutral or a drive gear selection. This input is used to determine idle speed (varying with gear selection), fuel injector pulse width, ignition timing advance and vehicle speed control operation.

Gearshift Cable

Check adjustment by starting the engine in Park and Neutral. Adjustment is OK if the engine starts only in these positions. Adjustment is incorrect if the engine starts in one but not both positions. If the engine starts in any position other than Park or Neutral, or if the engine will not start at all, the park/neutral position switch may be faulty.

Gearshift Adjustment Procedure

  1. Shift transmission into Park.
  2. Release cable adjuster lock (underneath the power brake booster) to unlock cable.
  3. Raise vehicle.
  4. Slide cable eyelet off transmission shift lever.
  5. Verify transmission shift lever is in Park detent by moving lever fully rearward. Last rearward detent is Park position.
  6. Verify positive engagement of transmission park lock by attempting to rotate propeller shaft. Shaft will not rotate when park lock is engaged.
  7. Slide cable eyelet onto transmission shift lever.
  8. Lower vehicle and check engine starting. Engine should start only in Park and Neutral.
  9. Lock shift cable by pressing cable adjuster clamp down until it snaps into place