LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mazda >> 2016 >> 6 Touring, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Symptom Troubleshooting - Engine Control System >> Symptom Diagnostic Index
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Symptom Diagnostic Index

-: Not applicable

DIAGNOSTIC PROCEDURE

No. TROUBLESHOOTING ITEM DESCRIPTION
1 Blown fuses -
2 Check engine light illuminates
  • Check engine light illuminates 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.
  • Battery is operating normally.
5 Engine stalls After start/at idle
  • Engine stops unexpectedly at idle, after start, or both.
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 stalls.
  • Fuel is in tank.
  • Battery is in normal condition.
7 Engine oil warning light illuminated/message related to engine hydraulic pressure malfunction indicated in display
  • Engine oil warning light illuminated.
  • Message related to engine hydraulic pressure malfunction indicated on the center display. (With center display)
  • Message related to engine hydraulic pressure malfunction indicated on the LCD in the instrument cluster. (Type A instrument cluster)
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 switched 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. (e.g., power down when climbing hills)
13 Knocking/pinging Acceleration/cruise
  • Abnormal combustion occurs under the condition such as the temperature in the combustion chamber is too high resulting in abnormal noise.
  • Knocking sound occurs from the engine compartment during acceleration.
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 Exhaust sulphur smell
  • Rotten egg smell (sulphur) from exhaust.
26 Fuel refill concerns
  • Fuel tank does not fill smoothly.
27 Fuel filling shut off concerns
  • Fuel does not shut off properly.
28 Spark plug condition
  • Incorrect spark plug condition.
29 ATX concerns Upshift/downshift/engagement
  • ATX concerns not related to engine performance.