P1902 fault code: what it means

P1902: TCM has received an engine system fault message. Check engine codes first.

Engine and gearbox (powertrain) · Keep an eye on

Usual causes, most likely first

engine fault codes stored
CAN fault

P1902 by make

Mitsubishi

TCM has received an engine system fault message. Check engine codes first.

Usual causes: engine fault codes stored; CAN fault

What the repair usually costs

Air-fuel ratio / front O2 sensor replace (upstream)NZ$270–NZ$750 · A$260–A$730
O2 sensor replace (downstream / after cat)NZ$180–NZ$480 · A$180–A$460
MAF (mass air flow) sensor replaceNZ$170–NZ$660 · A$160–A$600
Diagnostic scan, fault code read and report (warning light on)NZ$70–NZ$140 · A$80–A$150

Not sure what P1902 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.