Just like you, we see our share of new and unique vehicle problems. The 5 Fast Fixes below are examples of some recent head scratchers that we worked through with customers on our Repair Hotline.
These short-cut tests and confirmed fixes are now at your fingertips along with more than 600,000 Hotline Archives in Direct-Hit.
2006 Nissan Altima SL 2.5L, L4, MFI, DOHC, Eng Desg QR25DE
Had an intermittent misfire at idle. Found engine coolant in cylinder #2. Replaced the head gasket. On completion, the engine would not start and found the timing chain to be stretched. Replaced the timing chain, and the vehicle started and ran well on test drive. After delivery, the vehicle came back with a P0011. Replaced
the Camshaft Position (CMP) sensor, inspected and tested the Intake Valve Timing (IVT) solenoid. Oil pressure is low at about 10 PSI at idle when the engine is hot and the lifters start clattering. When the engine is warm, the cam angle does not seem to respond appropriately to activation of the IVT solenoid (80% duty cycle, 0 advancement at low RPM). On driving the vehicle while scanning, has erratic advancement with various IVT solenoid activation percentages. The IVT is 0 degrees at idle. The code does not set at idle - need to drive the vehicle and get the engine hot to set the code. So it is not a valve timing (timing chain alignment) problem.
1. Check the oil pan for being pushed in.
2. Check the oil pump pick-up screen.
3. Check the pick-up tube o-ring.
4. Check the o-rings on the front timing cover - maybe one fell out or didn't get replaced - especially if the low oil pressure problem was not there prior to replacing the head gasket and timing chain.
Timing Cover O-Rings
Replaced Engine Front Cover O-Rings: Replaced the O-rings between the timing cover and block.
This engine uses an IVT control solenoid to control oil pressure to the intake camshaft sprocket to control the intake valve timing. With the IVT not advancing on acceleration, and oil pressure is used to advance the IVT; fix the low oil pressure first.
2014 Chevrolet Equinox LT 2.4L, L4, MFI, DOHC, VIN K, Eng Desg LEA
Deep droning noise in the speakers at start up and certain RPM range. Was hit hard in front end. Came from a collision shop for this problem. After start, RPM increases to approximately 1600, then decreases, that is when the noise occurs. Happens 3 times during running after start, then gone.
1. The vehicle may have been built with the incorrect Active Noise Cancellation (ANC) module. This condition is caused by incompatibility between the ANC Module and the ANC Microphones in the headliner. If built from 08/12/2013 to 10/23/2013 check the part number (PN) on the ANC Module. If the ANC Module has PN 23434359, replace it with ANC Module PN 22929627. If the ANC Module has PN 22929627, replace it with ANC Module PN 23434359.
Incorrect Active Noise Control Module
Malfunctioning Active Noise Control Module
Replaced Active Noise Control Module: Replaced the ANC module with Part Number 23434359.
2007 Toyota Prius Touring 1.5L, L4, MFI, DOHC,Eng Desg 1NZFXE
Trouble codes P0301 and P0302 are setting in the computer. The misfire is very random. #2 ignition coil was replaced.
1. Check to see if the spark is erratic. Attach a timing light to one coil at a time. Tape the timing light trigger on and tape the timing light to the windshield and then drive the vehicle. Check to see if the timing light is cutting out.
Ignition Coil And Igniter Assembly
Replaced Ignition Coil And Igniter Assembly
Do not trust the misfire code data. As this technician found out, the coil that was faulty was cylinder number 3. All of the ignition coils were replaced.
2008 Ford Escape XLS 2.3L, L4, MFI, DOHC, VIN Z, Duratec
Intermittently it's hard to turn the key far enough to get the engine to start. The key gets hard to turn when going to the crank position. The ignition lock cylinder and ignition switch have already been replaced.
1. Refer to TSB 09-19-15 for this symptom due to a bad steering column lock module. The lock module is the housing that the ignition lock cylinder mounts in, the ignition switch snaps on to and has the linkage that connects the lock cylinder to the ignition switch.
Steering Column Lock Module
Replaced Steering Column Lock Module
2008 Smart Fortwo Passion Cabrio 1.0L, L3, MFI, DOHC, Eng Desg 132.910
Engine light is on with fault code P1A10 found.
1. Inspect park lock cable connection and operation.
2. Watch parking pawl operation when moving the shifter.
3. With a scan tool, read out park switch.
4. If the park switch is not reading correctly or the scan tool will not show the data, perform an electrical inspection of the switch.
5. Use anΩ meter, the switch should show open or close, depending on pawl position.
6. If OK, check the wiring from the switch to the transmission control unit.
Transaxle Park/Lock Cable
Park Switch Signal
Repaired Transaxle Park/Lock Cable: Cable had popped out of place.
A quick check for park operation would be to push on the car. If it rolls, the car is not locked into park.
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