my 2004 chevy trailblazer was running fine until i put a new left front wheel hub and cv shaft in it and now it idles rough and has a strong smell out of the exhaust any thoughts has the codes read an

Asked by Apr 10, 2017 at 06:57 PM about the 2004 Chevrolet TrailBlazer LS 4WD

Question type: Maintenance & Repair

8 Answers

74,645

Codes?

Best Answer Mark helpful

yes map sensor,oxy sensor,ect sensor and cam to crank sensor

79,475

Deal with the issues the codes are telling you about. The wheel was a coincidence.

already replaced the map sensor no difference what one should i do next

74,645

What are the codes? po...?

74,645

Looking over the codes, all these need to be interpreted. The MAP sensor was ok to replace, po128 indicates a thermostat or a temperature sensor problem, which should be addressed. The rear 02 sensor code po136 more than likely is caused by one of the other problems. So which leaves the biggest problem, the po016. This would be the root cause of the problems. The timing chain needs to be checked to see if it is stretched. There is a correlation problem between the crankshaft and the camshaft. Below is information on the po16 code.

74,645

P0016 CHEVROLET - Crankshaft Position - Camshaft Position Correlation Bank 1 Sensor 'A' ...Possible causes; Mechanical timing fault (stretched timing chain or damage timing chain tensioner), Blocked oil passage, Low oil level, Faulty Intake ('A') Camshaft Position (CMP) Sensor, Faulty, Crankshaft Position (CKP) Sensor.....If this DTC started after recent internal engine repairs, inspect for proper engine mechanical timing. With the camshaft cover removed and the #1 cylinder at top dead center, make sure that the darkened chain links are lined up with the alignment marks on the exhaust and intake cam sprockets. If a P0016 is resetting without any engine performance concerns but the above information did not isolate a cause for the DTC, replace the Cam Phaser Actuator sprocket....The Powertrain Control Module (PCM) has detected the actual Camshaft Position (CMP) Sensor angle of one camshaft is greater or less than the commanded state. Possible symptoms, Engine Light ON (or Service Engine Soon Warning Light) Engine hard to start, Engine stall while driving. P0016 CHEVROLET Description; The Crankshaft Position (CKP) sensor is a permanent magnet generator, known as a variable reluctance sensor. The magnetic field of the sensor is altered by a crankshaft mounted reluctor wheel that has seven machined slots, 6 of which are equally spaced 60 degrees apart. The seventh slot is spaced 10 degrees after one of the 60 degree slots. The CKP sensor produces seven pulses for each revolution of the crankshaft. The pulse from the 10 degree slot is known as the sync pulse. The sync pulse is used to synchronize the coil firing sequence with the crankshaft position. The CKP sensor is connected to the Powertrain Control Module (PCM) by a signal circuit and a low reference circuit. The Camshaft Position (CMP) sensor is triggered by a notched reluctor wheel built into the exhaust camshaft sprocket. The CMP sensor provides 6 signal pulses every camshaft revolution. Each notch, or feature of the reluctor wheel is of a different size for individual cylinder identification. This means the CMP and crankshaft position (CKP) signals are pulse width encoded to enable the PCM to constantly monitor their relationship. This relationship is used to determine camshaft actuator position and control its phasing at the correct value. The PCM also uses this signal to identify the compression stroke of each cylinder, and for sequential fuel injection. The CMP sensor is connected to the PCM by a 12-volt, low reference, and signal circuit.

the vehicle runs out on the highway like there's nothing wrong with it except the cruise is not working now also would that still be the cam and crank codes

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