Edmunds Answers



  • patrick88 02/07/11 10:01 pm PST

    Code P0016 is Crankshaft Position- Camshaft correlation (bank 1 sensor A

    The crankshaft position sensor (CKP) and Camshaft position sensor (CMP) work together to control the spark and fuel delivery and timing. .

    . What ties these two shafts and their sensors together is the timing belt or chain. The cam and crank should be precisely timed together. If the PCM detects that the Crank and Cam signals are out of time by a specific number of degrees, this code (P0016) will set.

    Symptoms of this code will or may include:

    A)Malfunction Indicator Lamp (MIL) illumination
    B) The engine may run but with reduced performance

    C) The engine may crank but not start

    D) The engine may exhibit a rattle near the harmonic balancer
    indicating the tone ring is damaged

    E) The engine may start and run, but poorly

    Causes may include:

    A)Timing chain stretched, or timing belt skipped a tooth due to wear

    B)Misalignment of timing belt/chain

    C)Tone ring on crankshaft slipped/broken

    D) Tone ring on camshaft slipped/broken

    E) Bad crank sensor

    F)Bad cam sensor

    G)Damaged wiring to crank/cam sensor

    H)Timing belt/chain tensioner damaged

    Possible fixes:

    First, visually inspect the cam and crank sensors and their harnesses for damage. If you notice broken/frayed wires, repair and recheck.

    1. If you have access to a scope, check the cam and crank patterns. If a pattern is missing, suspect a bad sensor or a slipping tone ring. Remove the cam gear and the crankshaft harmonic balancer and inspect the tone rings for proper alignment and make sure they're not loose or damaged or that they haven't sheared the key that aligns them. If they are properly installed, replace the sensor.
    2. If the signal appears normal, then check the timing chain/belt for proper alignment. If it's misaligned, check for a damaged tensioner that may have allowed the chain/belt to slip a tooth or several teeth. Also check that the belt/chain isn't stretched. Repair and recheck.

    Hope that helps


Top Engine Hesitation Experts View More

Rank Leader Points
1. zaken1 1370
2. MrShift@Edmunds 840
3. karjunkie 675
4. thecardoc3 105
5. morin2 100
6. docj 95
7. tony78 95