On Board Diagnostic System — Code No. 16 (EGR Valve Position Sensor)
F2-85flowchartCode No. 16 (EGR Valve Position Sensor)
1
STEP 1: Does EGR valve position sensor circuit have a poor connection?
Yes
Repair or replace connector
No
2
STEP 2: Is EGR valve OK? (see page F2-126)
No
Replace EGR valve
Yes
3
STEP 3: Is resistance of EGR valve position sensor OK? (see page F2-158)
No
same as step 2
Yes
4
STEP 4: Is there continuity between EGR valve position sensor and ECM? (A–2J, B–3D, C–2I)
No
Check for open circuit in wiring from EGR valve position sensor to ECM
Yes
5
STEP 5: Is there 4.5–5.5V at EGR valve position sensor connector terminal C? (see page F2-158)
No
Check for short circuit in wiring from EGR valve position sensor terminal C to ECM
Yes
6
STEP 6: Is ECM terminal 2J voltage OK?
No
Check for short circuit in wiring harness EGR valve position sensor terminal A to ECM
Yes
Replace ECM
STEP 4 continuity check — EGR valve position sensor to ECM
A
ECM2J
B
ECM3D
C
ECM2I