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stin1974
stin1974, Auto Service Technician
Category: Car
Satisfied Customers: 765
Experience:  Domestic transmission diagnostics and troubleshooting. General repair diagnostics and troubleshoot.
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What does trouble code PO203 injector ciruit open cylinder 3 mean??

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What does trouble code PO203 injector ciruit open cylinder 3 mean?? This is for a 1999 Jeep Wrangler Thanks cass
2.5 or 4.0?
Customer: replied 8 years ago.
This is a 4 cylinder 2.5 L 1999 Jeep Wrangler
P0203
Notes

Tests 201 - 205

Tests 206 - 209

SYMPTOM
P-0203 INJECTOR # XXXXX CONTROL CIRCUIT

WHEN MONITORED
With Battery voltage greater than 10.4 volts , the auto shutdown relay energized, injector pulse width less than 10ms , and engine speed less than 3000 rpm .

SET CONDITION
This trouble code takes 0.64 to 10.0 seconds to set when no inductive kick is sensed 0.18ms after injector turn off; and with no other injectors on.

POSSIBLE CAUSES

  • Auto shutdown relay output circuit open
  • Injector # XXXXX defective
  • INJ control ckt wiring harness intermittent defect
  • INJ control ckt wiring harness observable defect
  • Injector # XXXXX driver circuit open
  • Injector # XXXXX driver circuit shorted to ground
  • Powertrain control module defective
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