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Home >> Mazda >> 2014 >> 5 Touring >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine >> Engine Control System Symptom Diagnostic Index >> Diagnostic Index
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Diagnostic Index

No. TROUBLESHOOTING ITEM DESCRIPTION
1 Blown fuses -
2 Check engine light illuminates
  • Check engine light is illuminated incorrectly.
3 Will not crank
  • Starter does not work.
4 Hard to start/long crank/erratic start/erratic crank
  • Starter cranks engine at normal speed but engine requires excessive cranking time before starting.
5 Engine stalls After start/at idle
  • Engine stops unexpectedly at idle and/or after start.
6 Cranks normally but will not start
  • Starter cranks engine at normal speed but engine will not run.
  • Refer to symptom troubleshooting "NO. 5 ENGINE STALLS-AFTER START/AT IDLE " if this symptom appears after engine stall.
  • Fuel is in tank.
  • Battery is in normal condition.
7 Slow return to idle
  • Engine takes more time than normal to return to idle speed.
8 Engine runs rough/rolling idle
  • Engine speed fluctuates between specified idle speed and lower speed, and engine shakes excessively.
  • Idle speed is too slow and engine shakes excessively.
9 Fast idle/runs on
  • Engine speed continues at fast idle after warm-up.
  • Engine runs after ignition is off.
10 Low idle/stalls during deceleration
  • Engine stops unexpectedly at beginning of deceleration or recovery from deceleration.
11 Engine stalls/quits Acceleration/cruise
  • Engine stops unexpectedly at beginning of acceleration or during acceleration.
  • Engine stops unexpectedly while cruising.
Engine runs rough Acceleration/cruise
  • Engine speed fluctuates during acceleration or cruising.
Misses Acceleration/cruise
  • Engine misses during acceleration or cruising.
Buck/jerk Acceleration/cruise/deceleration
  • Vehicle bucks/jerks during acceleration, cruising, or deceleration.
Hesitation/stumble Acceleration
  • Momentary pause at beginning of acceleration or during acceleration.
Surges Acceleration/cruise
  • Momentary minor irregularity in engine output.
12 Lack/loss of power Acceleration/cruise
  • Performance is poor under load (such as power down when climbing hills).
13 Knocking/pinging Acceleration/cruise
  • Sound is produced when air/fuel mixture is ignited by something other than spark plug (such as hot spot in combustion chamber).
14 Poor fuel economy
  • Fuel economy is unsatisfactory.
15 Emission compliance
  • Fails emissions test.
16 High oil consumption/leakage
  • Oil consumption is excessive.
17 Cooling system concerns Overheating
  • Engine runs at higher than normal temperature/overheats.
18 Cooling system concerns Runs cold
  • Engine does not reach normal operating temperature.
19 Exhaust smoke
  • Blue, black, or white smoke from exhaust system.
20 Fuel odor (in engine compartment)
  • Gasoline fuel smell or visible leakage.
21 Engine noise
  • Engine noise from under hood.
22 Vibration concerns (engine)
  • Vibration from under hood or driveline.
23 A/C does not work sufficiently
  • A/C compressor magnetic clutch does not engage when A/C switch is turned on.
24 A/C is always on or A/C compressor runs continuously
  • A/C compressor magnetic clutch does not disengage.
25 A/C is not cut off under wide open throttle conditions
  • A/C compressor magnetic clutch does not disengage under wide open throttle.
26 Exhaust sulphur smell
  • Rotten egg smell (sulphur) from exhaust.
27 Fuel refill concerns
  • Fuel tank does not fill smoothly.
28 Fuel filling shut off concerns
  • Fuel does not shut off properly.
29 Spark plug condition
  • Incorrect spark plug condition.
30 ATX concerns Upshift/downshift/engagement
  • ATX concerns not related to engine performance.