Chattering Pathfinder Transmissions are precision machinery that do not like contamination in their fluid. Even a small amount of contamination will cause issues. SureTrack community member Nhaugen had a 2005 Nissan Pathfinder in the shop where the transmission would chatter at highway speeds. They posed the question to the community, and with the help of fellow community member trannyman1 and others, they were able to resolve the issue quickly. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 2005 Nissan Pathfinder SE 4.0L Title Vehicle chatter at 80km/h on highway, replaced transmission and cooler. Complaint Vehicle feels like it goes over rumble strips at around 80km/hr at steady throttle. Diagnostic Steps Performed/Parts Replaced Transmission fluid was changed recently and customer had a loud electrical whine from TCM. Checked fluid level and it is good, I suspect transmission issue. Just wondering if anyone can point me in a direction as to any PIDs a guy can monitor to find maybe torque converter clutch slippage or internal transmission slippage, I will also manually check line pressure. just trying to find the least intrusive way to diagnose this thing. Best Answer from Community Member trannyman1 Most of these I see have had the transmission cooler inside the radiator rupture and ruin the transmission. Even if you flush them, you normally can’t get them to quit shuddering. Check the fluid really good with either test strips for glycol contamination or the quick and dirty way. Get a metal spoon and put some fluid in it. get a lighter and heat it up. If it has much glycol, it will boil before the fluid will get hot enough to ignite. Regardless, most of these I get with a shudder have had glycol contamination. On a side note, if the radiator has ruptured, I’d recommend a remanufactured transmission because it normally ruins the TCM as well as the rubber seals. Cause Transmission fluid contaminated with coolant. Correction Installed remanufactured transmission and new transmission cooler. Problem solved. Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.

Code U1900 Replace ABS Traction Control Module - SOLVED

Get on the Bus CAN Communication Bus Fault? Now that’s generic. The Bus is the communications network used by many vehicles to make all the modules work together. When you have a bus fault code, you have to find out what part of the system is causing the issue. Follow this Real Fix to see how this was done on this 2006 Ford F350 Super Duty. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 2006 Ford Cab & Chassis F350 Super Duty 5.4 Title Check Engine Light Is On, U1900, Replaced Anti-Lock Brake Traction Control Module Complaint The customer states the check engine light is on. Cause Connected a scan tool and found code U1900 CAN Communication Bus Fault. There was no communication available with the anti-lock brake traction control module. Performed a visual inspection of the anti-lock brake system, wiring harnesses, speed sensors and detected no obvious faults. Performed a visual inspection of the anti-lock brake traction control module and found no obvious faults. Disconnected the anti-lock brake traction control module connectors, visually inspected the connectors and terminals and found no obvious signs of loose pins, corrosion or damage. Visually inspected the anti-lock brake traction control module wiring harness and found no obvious signs of damage. Used a multi-meter to check for the presence of shorts or opens in the anti-lock brake traction control module wire circuits and found that none were present. Used the multi-meter to check for the presence of power and ground at the anti-lock brake traction control module harness connector and found that both were present. The result of these tests verified the anti-lock brake traction control module was faulty. Correction Replaced the anti-lock brake traction control module, cleared codes, performed a road test and verified the vehicle operated properly. The check engine light did not illuminate and no fault codes returned. Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.

Ford Explorer erratic shifting Code P1717

Go With The Pack An erratically shifting transmission can be caused by many things. Follow this Real Fix to see how to diagnose code P1717 on this Ford Explorer and fix the erratic shifts. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 2004 Ford Explorer 4.0L Title Check Engine Light Is On, P1717, Replaced Automatic Transmission Solenoid Pack Complaint The customer states the check engine light is on. Cause Connected a scan tool and found code P1717 – SSD Inductive Signature Malfunction. Used the scan tool to monitor the live data, test drove the vehicle and found the transmission shifts were erratic. Visually inspected the transmission wiring harness and connectors and found no visible faults. The fluid was clean and at the proper level. Disconnected the automatic transmission shift solenoid wiring harness connector, inspected the terminals, and found no faults present. Used a multi-meter to check for the presence of a short in the automatic transmission shift solenoid circuits, and found no shorts were present. Used the multi-meter to check for the presence of battery power at the automatic transmission shift solenoid wiring harness connector and found battery power was present. Used the multi-meter to check the continuity of the automatic transmission shift solenoids and found automatic transmission shift solenoid “D” was intermittently electrically open when the solenoid was tapped on to simulate road shock. The tests indicated the automatic transmission shift solenoid was faulty. The automatic transmission shift solenoid “D” is integrated into the automatic transmission solenoid pack and is replaced as an entire unit. Correction Replaced the fuel pump resistor and verified the vehicle operated properly. The customer’s concern did not return. Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.

Replace Fuel Pump Resistor for Engine No Start

Too Much Resistance Sometimes a minor part can cause you trouble but it’s fairly simple to track it down for the fix. Follow this Real Fix to see how a bad fuel pump resistor was causing a no start condition on this 2001 Buick Regal. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 2001 Buick Regal GS 3.8L Title Engine Does Not Start, Replaced Fuel Pump Resistor Complaint The customer states the engine will not start. Cause Confirmed the customer’s complaint and found the engine did not start. Connected a spark tester to a spark plug wire, cranked the engine and found spark was present. Connected the spark tester to the remaining spark plug wires, cranked the engine and found spark was present. Connected a fuel pressure gauge to the fuel pressure test port, cranked the engine and found there was no measured fuel pressure. Visually inspected the fuel pump wiring harness and found no obvious signs of damage. Disconnected the fuel pump connector, visually inspected the connector and terminals and found no obvious signs of damage. Used a multi-meter to check for the presence of voltage and ground at the fuel pump, cranked the engine and found voltage was not present. Observed the fuel pump relay while commanding the fuel pump on with a scan tool, and found the relay made an audible click. Used the scan tool to command the fuel pump relay on while using the multi-meter to check for the presence of voltage at the output circuit of relay, and found voltage was present. Used the multi-meter to measure the resistance of the fuel pump resistor and found the measured resistance was above specifications. These test results verified the fuel pump resistor was faulty. Correction Replaced the fuel pump resistor and verified the vehicle operated properly. The customer’s concern did not return. Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.

Engine Code P1726 Ford F250

Fouled! The EGR system can cause several issues when something is wrong with it. Follow this Real Fix to see how a fouled EGR valve caused a code P1726 on this 2004 Ford F250 Super Duty with the 6.0L engine. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 2004 Ford Pickup F250 Super Duty 6.0 Title Check Engine Light Is On, P1726, Replaced Exhaust Gas Recirculation Valve Complaint The customer states the check engine light is on. Cause Connected a scan tool and found code P1726 – Insufficient Engine Speed Decrease During Self Test. With the engine at idle, monitored scan tool data and observed the exhaust gas recirculation valve parameter was erratic. Using the scan tool, commanded the exhaust gas recirculation valve to open and close and found the valve did not respond. Performed an inspection of the exhaust gas recirculation valve wiring harness and connector and detected no obvious faults. With the ignition on and the engine off, used a multi-meter to check for the presence of voltage and ground at the exhaust gas recirculation valve connector and found both were present. Removed the exhaust gas recirculation valve, visually inspected the valve and found that it was carbon fouled . The tests indicated the exhaust gas recirculation valve was faulty. Correction Replaced the exhaust gas recirculation valve, cleared codes, performed a road test and verified the vehicle operated properly. The check engine light did not illuminate and no fault codes returned. Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.

Serpentine Belt making a squeaking noise

Squeaking Isn't Always a Belt Usually when you hear a squeak from an engine you assume it’s the belts. drdiesel had a Chevrolet Avalanche in their shop that had a squeaking noise coming from the engine when it was running… but it wasn’t the belts. They posed the question to the community, and with the help of fellow community member dmckemie12 and others, they were able to resolve the issue. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 2003 Chevrolet Avalanche 1500 5.3 Title Squeak From Engine, Replaced Rocker Arm Complaint Squeak or rubbing noise from right side cylinder head valve train area, only with engine at operating temperature.. Cause Bad roller bearing in rocker arm. Detection You can pull the valve cover then plug the coils back in and run the engine, use a hammer handle and push hard on the push rod side of rocker and listen for noise change. You can also back the rocker bolt out a turn or two and SLOWLY tighten back down, noise will get louder when tightening if the roller on lifter and/or cam is bad. I’ve got a pickup load of bad cams from these same symptoms. Correction Replaced rocker arm, ran engine and squeaking noise is gone. Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.

Why is my engine idle so rough?

Why So Rough? It might be over 20 years old but that doesn’t mean you don’t want it to run smoothly. In this case the component related to the code was not the culprit. Follow along with this Real Fix to see what the cause was. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 1995 Mazda B2300 2.3 Title P1443, Engine Idles Rough, Replaced Idle Air Control Valve Complaint The customer states the engine idles rough. The customer also states the check engine light is on. Cause Confirmed the customer’s complaint and found the engine idled rough. Connected a scan tool and found code P1443 – Purge Flow System Circuit Malfunction. At idle, used the scan tool to monitor live data and found the evaporative emission (EVAP) purge flow sensor signal parameter was within the specified range of 1.5 to 2.0 volts. At idle, used the scan tool to command the purge solenoid open and observed the EVAP purge flow sensor signal parameter responded to changes in commanded purge rate and engine speed. Observed the idle speed was below the specified 475 to 575 rpm. Used the scan tool to command the idle air control valve on and found engine RPM did not change, indicating the idle air control valve was inoperative. Inspected the idle air control valve wiring harness and found no faults. Connected a test light in place of the IAC valve, used the scan tool to command the IAC valve on and found the test light was illuminated, indicating the wiring and control circuit were functional. Used a set of fused jumper wires and applied power and ground to the idle air control valve, and found the idle air control valve failed to operate. Used a multi-meter to measure the resistance of the idle air control valve and found the measured resistance was out of the specified range of 6 to 13 Ohms. The results of these tests indicated the idle air control valve was faulty. Correction Replaced the idle air control valve, cleared codes, performed a road test and verified the vehicle operated properly. The check engine light did not illuminate and no fault codes returned. Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.

Where is the Relay?

Relay or No Relay? Not all vehicles stay as built by the factory. SureTrack community member thewrench had a diesel Dodge Pickup in their shop where the fuel system didn’t match the factory information because it had been retrofitted. They posed the question to the community, and with the help of fellow community member DieseltechJon and others, they were able to resolve the issue. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 2004 Dodge Pickup R3500 5.9L Diesel Title No Power to the Fuel Pump, Replaced Relay Complaint Truck will not start and repair information states that truck is equipped with a fuel lift pump attached to the fuel filter/water separator housing but this truck does not. Found references to retrofits on some of these trucks where an in-tank lift pump is used which apparently this truck has. Diagnostic Steps Performed/Parts Replaced We have no power to the fuel pump wire at the tank, and have not been able to find a fuel pump relay although retrofit repair information shows that there is a fuel pump relay, but does not specify location. C1 Pin 19 at the ECM shows to be Fuel Pump Relay Control and C1 Pin 6 shows to be Fuel Pump Relay Return. Underhood power control center does not show any of the relays to be a ‘Fuel Pump Relay’. Best Answer from Community If this truck had the retrofitting done check the driver side firewall area for the relay. Usually somewhere between the battery and firewall. Cause Faulty retrofit fuel pump relay. Correction Replaced fuel pump relay and truck now starts. Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.

Clicking Killed the Battery 2007 Chevy Impala

Clicking Killed the Battery Finding what is draining the battery can be tricky, but sometimes your ears will help you find the culprit. SureTrack community member kenscssvc had a Chevrolet Impala in their shop because the owner complained that the battery kept going dead. The charging system checked out, but while working on the vehicle they heard some clicking sounds under the dash. They posed the question to the community, and with the help of fellow community members dmckemie12 and ironnutz, they were able to resolve the issue. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 2007 Chevrolet Impala LT 3.5L Title Battery Going Dead, Replaced A/C Control Module and Actuators Complaint Customer states that battery goes dead while vehicle is sitting Diagnostic Steps Performed/Parts Replaced Performed Charging system test and all is normal. Shortly after the test, while looking for loose wiring, a clicking noise was found and appeared to be moving throughout the dash in a cycle. The temperature control doors were clicking, attempting to move but were in fact stuck to one extreme. Scanned the HVAC system and retrieved 3 codes.  • B0223 Recirculate Position Command Circuit Actuator Stuck  • B0408 Left Air Mix Control Circuit Malfunction Actuator Stuck  • B0418 Temperature Control 2 Circuit Actuator stuck Best Answer from Community Try commanding the motors with scan tool to see if they operate. When they reach the end of their travel, the module sees the increase in amperage and turns them off. With the plastic worm gear worn off there is not enough load to raise the amperage so they continue to run. You can replace just the one that is ticking then reevaluate; not abnormal for them to set a code and still work fine. Cause Cannot command the motors – replaced 2 of the motors and still cannot command them. Internal failure of the controller causing motors to run with key removed draining battery. Correction Replaced HVAC control module and three bad mode door actuators. No more clicking noise and battery not draining with key off. Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.

Cruise Doesn’t Work? Check the Bulbs

The Bulbs for Cruise Control? SureTrack community member aph915 had a truck in their shop where the cruise control was inoperative and the cruise indicator light in the dash didn’t illuminate as expected. They posed the question to the community, and with the help of fellow community member ericsautomotive and others, they were able to resolve the issue. The following Real Fix summarizes the interaction between them in the community that led to the solution. Auto Repair Manuals Get everything you need to diagnose and repair your car problems today. Online access to the same auto repair information the dealership uses.

Vehicle 2002 GMC Yukon XL K1500 5.3 Title Cruise Control Inoperative, Replaced Bulbs Complaint Customer complained that the cruise control was inoperative. Further investigation determined that the cruise indicator light was not illuminating as expected. Diagnostic Steps Performed/Parts Replaced Checked for DTCs and found none. PCM shows cruise control inhibited-yes. Have checked switch functions at cruise control module and all work and powers and grounds are good. Performed service manual test for cruise control inoperative and came to replacing PCM. Replaced PCM and cruise is still inoperative. Speedometer working correctly. All brake lights working. Cannot determine cause of cruise control inhibit. Best Answer from Community Backprobe power and ground supplies to the cruise control servo. Are they all present and the right voltage levels?. Member Name: ericsautomotive Cause Found that the almost 5 volt signal at the cruise control servo was caused by customer installed LED brake light bulbs. Correction Replaced brake light bulbs with conventional bulbs and the 5 volts went away and the cruise control started working Source This is a Real Fix from Mitchell 1′s new SureTrack® expert information source. These documented issues from actual shop repair orders demonstrate how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free in our ProDemand product.